Don’t Get Ripped Off! How To Avoid The AC Capacitor Scam And Save $500

On my last AC maintenance check I saw firsthand how some AC techs get homeowners to agree to replacing parts that don't need replaced. In this video I will share with you my experience and show how they tried to prove to me that the capacitor needed replaced. I will also show you what to look out for so you can know if you actually need to replace a capacitor or if it is still good.
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[@HowToHomeDIY]

Has this ever happened to you? If so, was it the capacitor or something else?

[@tgriebe]

Fan wouldn't run. It was the capacitor. A way to test is to hand spin the fan and see if it runs then.

[@ryanslats6764]

How much did he try to charge for Capacitor installation . How much should you expect to pay for Capacitor installation?

[@SBinVancouver]

It wasn't the $500 scam, only $350. I had a pretty good idea what the caps cost. Disputed part of the CC charge, allowing for 100% uplift on the cap and cold start kit and labor. They capitulated. I read them the riot act when they wanted me to renew a service contract with them. I've purchased a backup for the start cap and I'll swap it out when the inevitable happens.

[@amiatroll6347]

Why on earth would you accept the service if you were going to dispute the charge?

[@SBinVancouver]

@@amiatroll6347 I didn't have any idea what they'd charge me, until they gave me the bill. At that point, the Technician is like "I don't set the prices".

[@4drturbo85]

Had a guy come out last year and he said the microfarads were at like 50%. He didn't lie. I tested it and it was at like 50%. But they wanted $430!!! to replace it. Called another place up they wanted $410! WTF. The part was $20 and took me 15 minutes to swap out. First time doing it ever too.

[@stephen-ng]

Sites like KZbin, TikTok, and the internet are great for learning. The internet isn't all porn, gambling, and black market deals.

[@lvsluggo007]

Yup... I got screwed like that a couple of years ago. A well-known HVAC company here in Las Vegas advertised a $39 AC checkup. I'd normally have the company that installed my ac do the annual, but they were swamped and I needed to have the system checked immediately as I was going out of town. The guy from this other company comes out, goes up on the roof, comes down about 15 min later with one of those capacitors in his hand. He tells me its bad, amd it will cost $500 to replace. I snapped a picture of the info tag on the capacitor for future use. Since I needed my ac working normally, I grudgingly told him to go ahead. While he was replacing it, I did a google search for the capacitor part #. I found it from various sources, starting at TWENTY FIVE DOLLARS.. When the guy came down I confronted him about it, and he basically said "thats the price, take it or leave it".. I wrote a nastygram to the company and said they'd lost a customer (yeah I know, they don't care).. I'm in Las Vegas, so ac here is absolutely crucial for about 1/2 of the year. The vast majority of ac here are on the roof rather than on the ground. I'm 74 years old and there is NO way I could go up a ladder to the roof to swap out that capacitor, even though I'd do if my ac was on the ground.

[@dannydaw59]

Can you buy the capacitors at a home improvement store?

[@CynthiaWord-iq7in]

Oh yeah. I'm 72, not tech-y, afraid of electricity...turned off whole house breaker, ha, took off panel. The round bottle was held in a clamp with 3 pole /terminal? With matching color wires, snapped a photo, scrolled through Amazon, they had every size 35, 40,50, identical label . Un-hooked them all rusty. Used no meters. Re-hooked new single capacitator $11, put panel cover back on, turned on house electric, turned a/c to auto, fan started blowing. No loss if it weren't the capacitator--2 jobs I can do on a/c, clean coils, change capacitator.s@@dannydaw59

[@mark98115]

@dannydaw59, probably not. I ordered mine from the internet. It was just under $10. I have a rental houses in Vegas and was taken for over $400 a couple of years ago. This year, another company with whom I have an maintenance contact, told me I soon will be needing a "compressor start assist" something or other. I asked him "do you mean capacitor?". He emailed an estimate for about $340. These people are crooks. At my house it took me 30 minutes from start to finish to replace 2 capacitors and that included additional testing and going in and out of the house to turn on/off circuit breaker an, thermostat multiple times.

[@choimdachoim9491]

As Handyman for a 24 unit building a tenant told me her HVAC Contractor son told her that a $300 part needed replacing in her unit's A/C and that's why it wasn't working. I went up on the roof with him and noticed that a double-contact switch was bent so only one contact would make contact. I straightened it out and never had another problem with that unit. I realized later that the son had done that because he was out of work and his mommy was helping him out. What I'm about to say doesn't apply to all Contractors but when one of my brothers got his General Contracting License he said to me that basically it was a license to steal. Many Contractors have this attitude. I dealt with 16 Contractors on one job for a couple years and I was disgusted with how little any of them could be trusted to tell the truth or to do their work correctly without oversight.

[@christianlandry4499]

As an AC tech I hate to admit that there's a LOT of technicians out there that will try to sell you parts just to make money. Personally, I hate how much most companies upcharge on parts. I get that what you're technically paying for isn't the parts but our knowledge as technicians. Companies usually get a discount at supply houses, so say they pay about 5 - 10 bucks for a capacitor. They then turn around and sell it to the customer for $300 - $500. I worked for one company that sold capacitors for as much as $575. As a homeowner, the more you can learn how to check and fix yourself, the better. Having a shop vac and knowing how to test a capacitor will save you from just about 90% of service calls in the state of Florida.

[@iratedu2776]

As an ac tech you should know this video doesn't show anyone how to check a capacitor properly... you test capacitors under load not while the unit is off.

[@christianlandry4499]

@iratedu2776 If that's what you honestly believe then I hope to whatever greater power you might believe in that you don't do this for a living, or that you somehow have capacitor and contactor confused.

[@TobyD43]

Checking a capacitor under load is only one method and is not more accurate than doing it as the video shows. It’s a fact, look it up.

[@jbc1042]

Thank you for your post. It was very helpful. ❤

[@japhethwillmore725]

@@christianlandry4499in what? You absolutely check a capacitor under load using amps, volts and math.

[@phillipmeeks2391]

You have to watch HVAC companies. Not all will cheat you but a lot will. I'm a disabled HVACR technician with 40+ years experience. Companies have a lot of overhead. They have to pay for gas for the truck, insurance, technician's pay, tech's insurance, and other costs that the consumer is unaware of. They also have to have a business license for EVERY town and county they do work in. That's why repair costs are so high. Everything the video tells you is correct on checking a capacitor. There is one thing that a digital volt meter can't tell you is whether the capacitor is leaking between the plates at high voltage. I have had some test ok with the digital meter but I still had to replace them when tested on my 'old' 110 volt analyzer that I've had for years. I don't believe they make them anymore but it will test one under 110 volts of power and a load vs. 9 volts or less on the digitals battery. It has been invaluable to me in my career. If however, a digital tells you it's bad, then it's bad (if tested with the wires disconnected).

[@rwbishop]

More: in addition to taking photos of the old cap wiring, write down which wire goes to what terminal... they might be laid out differently on the new cap. Be sure the connectors fit snug... and write the install date on the new cap with a Sharpie.

[@Mach141]

You could simply include this information in your photo

[@stevenhunt66]

@@Mach141 The point is, you are helping the next person who might be servicing this unit with the info written down on the capacitor. They won't have access to any pictures and even the person who took the pic can lose access to the picture by it being accidentally deleted, or phone lost, etc. Writing it down bypasses all those issues and helps whoever is servicing the unit next.

[@KY4K-10]

That is correct..... help the next guy out.

[@jbc1042]

Thanks for your information, it was very helpful! ❤

[@Mach141]

@@stevenhunt66 Are you for real? When it was installed last is worthless information, it works or it doesnt. If its under warranty then the same company that installed it will be called to fix it, and they have records of when it was last installed. And the wires are already connected before you remove it, so you take a picture EACH time before removal. No old pictures needed. Lmao. Hope that wasnt too mind blowing for you.

[@mhammer5]

Since I am familiar with the basics, capacitor start electric motors I replaced mine on the unit outdoors for $2.50. I had another capacitor fail later on with the blower motor that operates the squirrel-cage. It was winter and we needed the blower to work as I could not buy the capacitor right away. So what I did was take a screw driver and spun the squirrel-cage just enough so it would rev up to operating speed. It only took a gentle push. I then switched the thermostat control to fan so it would continuously run and not stop until I bought the capacitor and fixed it. Of course after it was fixed I switched the fan back to auto.

[@David_Poole]

This is a very common misconception, but a run capacitor doesn't start a PSC motor. The run capacitor is wired in series with L2/N. When the capacitor fails, it breaks the start windings connection to ground. When this happens, only the run winding draws current. The run winding is unable to shift the motor out of phase and spin up. When you flicked it with your hand, you acted as the start winding, allowing the motor to run. I'm an HVAC technician, and I've only met a handful of guys who actually understand it. I'm happy to hear you were able to figure out a way to get you by while you waited for the part to come in.

[@tankthebear]

so YEARs ago - maybe 30 - I had this cap go out on my AC .... I couldn't get an AC tech out right away a friend of mine said he had a guy who just fixed the heat pump on his POOL - and he likely could look at my AC ... SUPER nice guy ... he brought me out there WITH HIM and showed me the cap bulging ... and how to replace them. Charged me 100 bux plus HIS price on the cap ... since then for each house I have had I research the right size cap needed and keep one on hand. Plus I add hard start kits. AND ... I have had to use this TWICE! Within 15 min I was back up and runniing.

[@anthonygiannotti759]

back in the day it was common knowledge that an a/c condenser fan not turning was a sure sign of a bad capacitor . an easy way to check is to take a long thin screwdriver and manually spin the fan in the proper direction and if it runs as always your capacitor is the issue and a easy fix , you can now leave a/c unit on and cool down house but if you shut unit down that condenser fan won't restart without going through the process as noted before. do not remove fan grate so your protected when doing this test . been doing it for years for neighbors with central ,window and refrigerators .saving them from being taken for a ride on a simple service call,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,

[@user-ty2uz4gb7v]

The hero we need 🫡

[@user-fh4qb9fs9e]

Digital multimeters are the cats meow compared to what I 1st calibrated as an Air Force 324X0 starting in 1969. But "God" tools they are not. The Klein MM400 is spec's at 3% +5 counts in the range of 400 nf (nanofarads) to 40 uf (microfarads). The total capacitance range is 40 nf to 200 uf so the accuracy at 70 uf is...unspecified. What this means to the user is that a capacitor spec's at 6% can show out of spec's when it's good and in spec's when it's in fact out. PMEL guys are anal about test equipment spec's cause...

[@miltonthecat2240]

Interesting video, thank you. When removing screws, I sometimes stick them to a small magnet that I stick to a metal part nearby. When removing screws that won't be reassembled right away, I like to put the screws back into their holes and tighten them enough so they don't wander away, even though this takes a bit of extra time. For the electrical measurements shown: 1) I like to measure large capacitors with a voltmeter in addition to discharging them, because sometimes the voltage creeps back up after discharging, and sometimes a seemingly conductive metal surface isn't actually very conductive, due to the use of certain plating methods, or just due to oxidation or surface contamination; 2) When making measurements with a meter, I usually make at least two measurements, one with the leads reversed - if the measurements don't match, this is a clue that an assumption being made isn't valid (as far as why two measurements wouldn't match, the devil is in the details, but it's a strong hint to stop until you figure it out); 3) The measurement method used in many handheld multimeters to measure capacitance is a bit of a kludge, to take advantage of the existing meter circuitry, which allows the feature of measuring capacitance to be added with minimal additional cost to the meter manufacturer. Because of this, the potential meter error of the capacitance measurement can be unexpectedly large, and needs to be added into the capacitor tolerance when determining whether the capacitor is withing tolerance. Also, because of the measurement method used, reversing the leads and remeasuring is particularly important.

[@CP-mj8wd]

I use youtube a lot it has saved me a lot of money, it's videos like this that have worked for me. I've found out you need to watch several different ones just to be safe. You do excellent videos. Thanks

[@fraydnot]

I had a tech tell me mine was bad, then showed me the reading on his scanner. I tested the capacitor after I removed it getting the same results. I watched your other video on checking capacitor, just replaced one. I put in the Titan HD brand made in the USA. Thanks for your time/knowledge.

[@thisisyourcaptainspeaking2259]

I stopped here to say make sure the spade terminals are clean and tight because if not, the terminals will burn up and the compressor or fan will fail to start and run. Also, keep a spare capacitor of the correct values on hand, they typically fail between 3~5 years, better capacitors last longer but failure is pretty common.

[@AndyFletcherX31]

Inverter aircon systems control the motor speed electronically and don't normally have motor capacitors. They are also more power efficient so if you have an old aircon it may be worth replacing it an inverter unit to save money on power. When I was working in the Middle East the outdoor unit capacitors seemed to fail after about 3 years so I got into the habit during the annual maintenance/cleaning of giving the maintenance guy $20 and getting him to change the capacitors every two years. Saved on callouts and I had the most reliable aircon in the compound. Didn't help that they always installed the units on the flat roof without a sunshade - I'm sure it reduced the efficiency by a third!

[@johng753]

I just called for a company for a HVAC checkup. Technician was here for 15 minutes. He comes in and tells me my capacitor is going bad and will destroy the fan motor unless I replace it. Cost me $550 parts and labor. Wish I had seen your video a week earlier. I hate being ripped off!

[@larrydubill]

Perfect! Thanks so much. My fan stopped spinning, so I cleaned the fins, I replaced the flux capacitor, works great! Best $20 I ever spent. Saved hundreds! Thank you so much!

[@archieosco3176]

In some rare instances, the cap can check good just sitting there, but not work properly in use. I wouldn't recommend someone unfamiliar with electrical work try it, but you can measure the amperage with wrap around ammeter and then check the voltage from the common to HERM. MFD = amps x 2652/voltage. I would do this if the capacitor checks good on the bench, but fan or condenser still behaves as if capacitor is bad. There are some good KZbin videos that show you how.

[@HowToHomeDIY]

@mr.fiero87 😂 yes it is.

[@HowToHomeDIY]

Completely unnecessary. The MFD levels are based on it NOT being under load. It should also be tested that way.

[@mr.fiero87]

Eww dude , I was a frequent watcher of your content .I criticize you and you act like a child . Unsubscribed.ill like this one too ,lol

[@HowToHomeDIY]

Yeah you’re right it was kinda petty. Like away!

[@archieosco3176]

@@HowToHomeDIY I was referring to a defective capacitor that shorts out under full voltage vs. the relatively low voltage a multimeter supplies to measure capacitance. Again, I would only check it under load if it measured good, but the fan or condenser unit would not run, but was getting power.

[@bigpebble]

Good video. One tip I'd add is to get your HVAC model number and go to a site like RepairClinc and buy a Capacitor and Fan Motor to have when needed. It'll save you money when they go out and the repair tech want to charge you outrageous amounts for generic parts instead OEM parts for less $$ (OEM Capacitor $20-25, vs $80-90, OEM Fan Motor $200-250 vs $450-600). Capacitors are easy to change, but getting the fan off of the motor can be a pain. Some companies won't use your parts (they want your $$), but better ones will and maybe have you notate that they used your parts.

[@Jim-DCE]

Is this kind of an UPDATE VIDEO from the last one, which also discussed the capacitor and not getting scammed. Very helpful video as it saved me a couple hundred when we moved in and had our AC checked. I've used your videos to help me install quite a few things in my home - thank you.

[@areizman]

Following my annual 'inspection' my service tech tried to sell me a new cap and relay for my AC. Said the relay was making a noise and that usually means the capacitor is failing. Said I could replace both for $450. Such a deal. Since my ac was running fine I declined. After he left I turned it back on and listened for the 'noise'. Sounded normal to me. Now that I've seen this video I'm confident I can fix this myself if it ever fails.

[@38Maelstorm]

If you test hot to hot and it reads less than 1 volt AC, there is no reason to test between each hot and ground. To get 240V, each hot is 120V which are 180° out of phase with each other. So if one hot is dead, it will still read 120V. Then you check each one to ground to find out which one it is. But hey, if you want to be extra careful and in the name of extreme safety, by all means. Extra checks won't hurt. As for discharging the capacitor the way that you are doing it is wrong. Granted, the capacitor is low value, but the current pulse can damage it when you short the terminals. The proper way to discharge a cap is to connect 1K ohm resistor between the terminals and let it sit for a for a minute or two. For those that don't know, capacitors are energy storage devices. They store energy in an electric field between two plates. Because of this, caps will not pass DC, but will pass AC. If you have a multi-meter without a cap tester, then you use use RC charge and discharge to determine the value, or use a signal generator to measure the voltage across the cap and measure the current through it. Capacitors are reactive components meaning that the resistance to AC (impedance) depends on frequency according to the formula 1 / (2 * pi * F * C). I was trained in electrical and electronics almost 40 years ago then I earned my engineering degree.

[@jayztoob]

As an electrician, I ALWAYS test my tester on a live circuit before testing the equipment. And OL doesn't mean, "open line". It often does mean, "over limit", though.

[@BlondieSL]

Jay, I beg to differ. I'm sure it means, OHHH LORDDD! ROFL I know that I've said that on occasion! ROFL just kidding ✨👍😁👍✨

[@gunsnwater2668]

Cause if it was open the display wouldn't change.

[@knagl]

A number of years ago our A/C wouldn't work and just made a loud buzzing sound. Of course it was hot outside and we needed it fixed ASAP. Most local supply houses wouldn't sell to a DIYer, but my local Grainger store had what I needed and didn't have a problem with me buying it. I replaced the capacitor and we were back in cool business! I ordered a spare from Amazon and have it standing by if there's a next time.

[@be_reel]

Yes, the service tech told my ex-wife that it needed to be replaced and quoted $500. I went to Grainger got the replacement for less than $15, needless to say I started using another company for our tune-ups.

[@TheKingOfInappropriateComments]

I've done a couple of these at my last house a long while back. Then a couple years ago it needed to be done here but I didn't test it. The AC crook charged me $500 for a new capacitor but most of that was due to the fact that he was the only AC repairman in town and he was well aware of it. It used to be that I had to go to the supply house a ways away to get a replacement but now they seem to sell them at HD and AMZ of course. Thanks, I saved this vid for the next time.

[@tonym6920]

Great vid, thanks. I knew most of that already but it’s nice to go over it again just to refresh my memory. I think most HVAC technicians know how to test a capacitor, but with the shortage of workers these days, anything goes. 👍👍

[@gregmgm06]

This is so helpful....great video! My wife and I just purchased a new house, so im bookmarking your video for obvious reasons.

[@HowToHomeDIY]

That's is awesome! Congrats to you both on the new home! Really glad to hear you liked. Thanks a ton for the feedback Greg! Enjoy getting settled in.

[@tookeno]

I repaired my A/C unit today following your video guidance. Thank You. Cost me a little over $23 dollars.

[@michaelhale2594]

I wish I had seen this video before my HVAC service provider told me during a routine check-up that I should have hard start capacitors (secondary capacitors) installed on each of my two AC units. He said one of my units was pulling 280 Amps during start-up so was at risk of imminent failure, and, if it failed, would likely require replacing the entire unit. Another HVAC technician later said their company recommends installing hard start capacitors on all HVAC units once they have been in service for 5 years. Not knowing any better, I agreed, and was given a $1,000+ bill for what took less than 30 minutes of effort. As you point out in this video, the two replacement capacitors actually costs less than $25 each.

[@Aspen5.7]

When my capacitor went out, I called around to all the AC repair places and they all said they would need to send out a tech to look. I even told them which capacitor I had and even though it was a very common capacitor, they said they would have to order it. I went on Amazon and ordered it for about $15 and had it in 2 days. Bought a few extras too. Luckily we have multiple AC units so we just used the one that worked and fanned the cool air to the rest of the house. They get the average homeowner because when these go out, it is hot and they need it fixed right away. My neighbor paid over $400 to have his fixed.

[@johnleo2668]

This will save people money as long as they know what they're doing, which this video shows you how to do it. You're a gentleman.

[@Bryan-Hensley]

Yeah, the meter costs more than a service call.

[@HowToHomeDIY]

@Bryan-Hensley you’re being an HVAC guy and saying things that can be true but don’t usually play out that that way. The meter I used in the video is $80-90. Service calls alone are either that much or more. That’s just for the service call. But then if you replace it, it’s much more money. And for that $80-90 I have an asset for the future when I need to check it for this or any other electrical projects. Where when I call someone out I’m basically just burning that money and hoping I got an honest AC tech. Because I had this meter and know how to use it, I saved myself from having my capacitor changed unnecessarily.

[@HowToHomeDIY]

@johnleo2668 really glad to hear you liked it! Thanks a lot for the feedback John!

[@anthonymiller4451]

​@Bryan-Hensley lol what? That might be true if you get a nice fluke, but besides that... where you get your meters? I'll sell you some used( and tested within the last year) ones for... cheap?, apparently lol?. Fluke, Klein, ideal , commercial electric. W.e. you'd like lol Edit. Shit I'll sell some new ones too lol.

[@michaellee6868]

Thanks for the video. This may be obvious to most, but let me point out to beginners that you have to correctly select AC or DC on the multimeter. Most will not warn of dangerous AC voltages in DC mode, and vice-versa.

[@MrLouisianaHayride]

Been in the AC biz for many years and let me let everyone in on a little secret. In order to stay in business most companies have to charge a minimum. It varies depending on where you live. So, you're not paying $300-400 for the part. You're paying the minimum a company can afford to run a call for and still pay the bills. Its astronomically expensive to be in business. And those costs get passed along to the customer. The required insurances alone for most companies are thousands of dollars a month for instance. That's why you see established credible companies bill that much for even simple repairs. That's not saying there are not shady people out there. There certainly are, everyone has probably experienced it. Some car mechanics come to mind. Educate yourself and be smart but also understand the realities of what it takes to run a profitable business in 2024.

[@HowToHomeDIY]

Then explain how one company can charge $150-200 and so many others charge $400- 1500 plus? There is too much disparity in the pricing

[@MrLouisianaHayride]

@@HowToHomeDIY Pretty simple. Small one man operations have practically no overhead vs larger companies. One company has a fleet of trucks, a full crew of techs, office space to rent ect. The fellow who can afford the $150 charge likely works form a home office. Speaking in general terms here. There are always outliers.

[@HowToHomeDIY]

I mean the company I have a service contract with is a larger operation with numerous service trucks and techs and they charged my dad $125 to change his capacitor. So I don’t know.

[@MrLouisianaHayride]

@@HowToHomeDIY Then you dad got a fantastic deal! I can only speak to my own experience. Only point I'm trying to make is that just because a bill might seem large you can't automatically assume your being cheated, Try calling Trane for instance. I had to use them for a unit on a commercial site that has Trane OEM controls that only they can work on due to OEM software. The fee just to have them show and troubleshoot was just shy of $1000 and that was pre pandemic. Would not be surprised if it was more now. Yes, I understand we are talking residential here not commercial. But Trane has huge overhead and pay techs better than anyone in the biz. Massive overhead = high price. Anyway, I appreciate what you do on your channel. Just providing a perspective from the other side of the equation is all. Keep up the good work!

[@bruerR8757]

Thank you. Another great video and I too fell for the A/C scam but it cost me $600 for a $45 part.

[@SuperS05]

1:11 you should check continuity of your probes before checking for voltage. It's an important safety check especially if you haven't used the meter extremely recently. When confirming power off, I'll check continuity before AND after confirming no power.

[@johnwest7993]

A capacitor is essentially 2 large-surface plates that are close together but don't touch. Trying to measure its DC continuity (resistance) is useless since the plates don't touch. In fact, if you do get DC continuity, it's bad. The plates are touching. In practice there is a thin insulator (dielectric) between the plates that keeps them from touching, and the plates themselves are made of metal foil. Everything is rolled up into a jelly-roll shaped cylinder in that metal can. The way to test a capacitor is with a capacitance meter or a multi-meter with a capacitance measuring range, as the tester sends an alternating, (+/-/+/-) voltage between the plates and measures the interaction.

[@globalthesource2756]

Thank you for supporting our AmRad products!

[@kathyortiz8774]

I purchased a meter to measure capacitance and inductance (somewhat like yours) specifically to test our air conditioning capacitor, and purchased a couple of new capacitors. Both were inexpensive enough to purchase just to solve our failed air conditioner. Sure enough, our capacitor was bad. I replaced the capacitor, and solved our air conditioning failure. I have also purchased and replaced the AC contactor (relay) to fix our A/C, and saved a lot of money by purchasing the contactor from a surplus parts company. Joe

[@zer0dahero]

You are very patient. I would have called that tech’s boss to ask why they sent a boy who doesn’t know how to test a capacitor and ask if their techs are that clueless or is it by designed. If anyone working with electricity in your home doesn’t know what they’re doing, have them pack their crap and kick them out of your property immediately.

[@HowToHomeDIY]

Yeah I couldn't believe it. Especially as we were talking and he said he was a 15 year tech. I personally think it was done on purpose due to that but can't know for sure.

[@qapla]

Good video and explanations. One addition would have been to also show/explain how to test the capacitor with the Ohm setting on the multimeter since everyone does not have a multimeter that reads MFD's.

[@rcampbell4967]

Shit. My capacitor went out a few years ago in what people think as an "affluent" neighborhood in Pasadena, CA. The older man with a thick European accent came out on a Sunday and replaced it for $75 including parts and labor. He also advised me to never replace the 20 year old system because it has more life left in it than a new system installed today.

[@elangomattab]

I didn't give any HVAC professional a chance to try to scam me a few weeks ago when my condenser fan wouldn't come on. Watched a few videos on KZbin and then checked the capacitor. Mine was obviously failed since the top was building badly. Got a new one, hooked it up, and it's working again. I did find out that my multimeter doesn't have the right mode to test the capacitor though. 🙁

[@stevencole7331]

Most of the basic multimeters don't do farads

[@General-Eclectic]

That Klein meter he's using is pretty nice. Not Fluke level, but much better than the junk you'd buy on Amazon.

[@Matthew.Morycinski]

Most caps fail either open or short. You could just use a continuity tester. If it beeps continuously, it's short. If it never beeps, it's open. If it beeps for a time then stops, it's OK (the higher the capacitance the longer the beep - you could see how long on a known good replacement.)

[@redbaron6805]

@@stevencole7331 You can get a Fluke 101 which is like $44 which tests capacitors also.

[@richseahag4980]

I charge $180 for the first half hour $90 each additional half hour plus parts with a mark up of actual price of part plus 8.625 % for stocking hundreds of different capacitors on my truck plus sales tax. Don’t care if it’s a boat-ac-refrigeration unit-ice machine if you’re rich or poor. That’s what I charge to feed my family.

[@otm646]

You're a liar or you're a poor HVAC businessman. The Turbo 200 was designed specifically, so you don't need to carry multiple capacitors on the truck.

[@jon6969]

@@otm646you’re kind of throwing money away if you’re buying the turbo 200 at best. At worst your overcharging your customer by using them every time. installing them on every cap service call is goofy. There are a few common capacitors that cost 10-20$. The turbo costs 80$. Sure I have a couple but I would rather not use them if I don’t have to.

[@bertellijustin6376]

@otm646……..you carry only 80 dollar caps on your truck?!? Why? Seems like your ripping off your customers for your own ease. Where I work we keep a mess of caps in our temp controlled warehouse and carry a couple of various sizes on our vans. (Caps that stay in the van have a shelf life, heat is the enemy of caps). If the yen dollar cap I install goes bad the next day, I replace it with a fresher cap from the warehouse. Eating a twenty dollar mistake is cheaper than eating a 100 dollar mistake.

[@ReadTheBible33]

You must live up North or you're what those other 2 said....

[@rwbishop]

Caps are really failure prone... usually going bad at the first heat wave of the season. They're like a $20 item... I replace mine as preventive maintenance every 2 years no matter what, and keep a spare. Even have a repeating calendar event set up as a reminder. Life's too short for baking a few days over a bad cap, and paying $100 or more for one off some HVAC guy. I also keep a spare contactor... they fail now & again as well. Also a low dollar item.

[@wightboy12345]

As an HVAC guy, a good chunk of my summer service calls are just walking up and replacing capacitors. I’ve had them fail inside a month from a factory new condenser. It’s a good thing they’re a cheap part.

[@sunshine3914]

Dang boys, my unit’s 33 yrs old & only two service calls; one was freon & the other was a tripped breaker. Upper 90s - 114°F is common… already hit 100° 2x this year.

[@wightboy12345]

@@sunshine3914 Why did you have a Freon call? Leaking valve?

[@diyhvacguy]

Very informative. Thanks bro! 👊🏼

[@HowToHomeDIY]

Appreciate it bro!

[@myfakeguuglaccount8307]

When my first one went out, I wanted to be sure even though I had researched my symptoms. The A/C guy wanted $350. I said "Dude, you're out here, so I'm willing to pay you $150, but you know that's a $20 part, and it'll take you five more minutes to install it." He held firm, so I over-nighted one from Amazon. $30.

[@sprockkets]

Caps are gravy train for a/c techs. It helps balance out the times they have to spend hours figuring out a problem and they don't charge extra for it.

[@Bryan-Hensley]

Did you diagnose why it failed? There's a couple of things that can kill the compressor. Low Freon will cause a capacitor to fail because low Freon will overheat your compressor, for one example..

[@Bryan-Hensley]

​@@sprockketsnot really unless the reason it failed is obvious. They seldom fail for no reason.

[@Mach141]

@@Bryan-Hensley ive had two fail for no reason, in 5 years, other than they are cheaply made garbage, like everything else these days

[@Bryan-Hensley]

@@Mach141 if you use the kind that has the solder looking spot on top (like in this video), they are junk.

[@scottsluggosrule4670]

Old AC tech told me tune ups are a racket....He said corrosion causes leads to have higher resistance and causes the most problems. Just turn off the power..remove every wire / connector you can get to and clean the contact area. Also clean out debris and clean coils. Been doing that every spring and my 27 year old unit is still going strong.

[@Jzzonem]

Corrosion is usually caused by a loose connection more than anything else like environment so instead of cleaning them, they should be replaced if corroded. Waste of time to "clean" them every spring" because of corrosion. Just my two cents.

[@BlondieSL]

@@Jzzonem Perhaps, whether "cleaning" contacts or when installing new contactors and other connections, putting some Dielectric grease on them might help to avoid corrosion. You are right about loose connections for sure, but never underestimate what the environment does to contacts where the air can get to them. I've had to "fix" many very tight contacts that have become corroded with a lovely shade of blue/green fuzzies, in my time. LOL I always put Dielectric grease on the now.

[@scottsluggosrule4670]

@@BlondieSL I have never seen severe corrosion..just minor..a little emery cloth then contact spray and reconnect. I am sure folks in more severe climates such as near the ocean could get some severe corrosion.

[@rickyward3600]

Not sure why my phone sent me a notification of this video but I'm happy to have discovered your channel over the matter lol subscribing.

[@P.Galore]

I was quoted $450 labor plus part to replace the capacitor. I replaced it myself for $25; turns out the one I replaced was just fine - the unit had tripped a circuit breaker.

[@carbonarrow7]

Some AC units also have a run cap too, so do not get those mixed up between the Start CAP and the run CAP.

[@philosothink]

25yr hvac experience here. I've had exactly one capacitor that held charge after being disconnected from power. That's one out of several thousand capacitors. It hit about as hard as you'd expect out of 240v. I found it so incredulous I touched it for a second shock. It was still holding nearly 140v after socond shock. I did not check it with my fingers a 3rd shock. If a used capacitor wobbles when sat upon a flat surface it's swollen and will be out of spec.

[@TheGhettoLobster]

Ive only seen it a few times in 10 years and the only reason they held a charge because either a wire broke or a winding was damaged, hence, it wasn't able to discharge. If your capacitor can't discharge that is a clue that there is a bigger issue in my experience.

[@philosothink]

@@TheGhettoLobster this cap would shock you, uninstalled, in your hand. I could walk up to you, and poke you with it and it'd shock you!

[@calvinbarnes7664]

Good job explaining that😂 I have a carrier two and a half ton unit

[@cbob1]

Excellent video. Sadly most techs sell those $20 caps for $100+ then lump $150 - $200 in labor on top. For the fan side in an emergency a homeowner can get the spin started with a long screwdriver. Once spinning it will keep going until the t'stat reaches temp and shuts off.

[@BadPhD777]

A couple years ago my heat pump quit working and it was the same cap you're working with. It was bulging out, and the service tech showed me that, so I had him replce it. But $300?!? I didn't know any better at the time. A few weeks ago my heat pump quit working and the start relay was fried. There were two caps in close proximity (my unit has three caps) that I didn't know the condition of (my multi-meter didn't read capacitance) so I just ordered them along with a relay and a new multi-meter. Total bill $100 and the unit is running fine now!

[@charlespeck886]

I fixed one years ago by checking uf and determining the part was bad, replaced with new USA Cap and all worked fine! Cap was about $35.

[@HowToHomeDIY]

Yup. Easy Peasy! Glad you were able to get it back up and running! Thanks for the feedback!

[@daleallen1964]

Don’t forget the voltage rating. Not only does the MFD rating have to like for like, the voltage has to be the same or larger, never lower. So your 70-5 at 440 volts has to be a 70-5 440 volts. Not a 370 or 240 volt unit. If you have a smaller 30MFD 370 volt, you can use a 440 volt but not a 240 volt.

[@KevinSmith-ys3mh]

Those were some very good points, and the higher volt rated caps MAY actually be more reliable in service, though more expensive. I suspect that many cap fails are caused by power spikes repeated over time, (like back EMF from the motors, or near area lightening strikes) that nibble away at the weak spots of the insulating layer, until it blows a short. Also, in electolytic caps the seal may fail due to heating, resulting in it drying out the wet chemical insulating film and going open. The one on my grinder that started hissing, then blew it's guts out the side is anyone's guess!

[@orinmangar2333]

Also it is very important to make sure the wire connectors are not loose when reattached them!!!

[@What1zTyme]

Great lessons! Thanks for sharing w/ us!

[@HowToHomeDIY]

You are very welcome! Really glad to hear you liked it. Thanks a lot for the feedback!

[@Mike_The_Hog_A_Nator]

Great info... Most all of the time you your compressor will not kick on is because of that Capacitor. I bought 2 off Amazon cheap just to keep around the house for when mine goes out. My local A/C Repair charged my Dad $1200 for is very cheap part that takes 5min to install. I'd go outside & get the number's off your's & buy 1 or 2 off Amazon. My local HVAC place sells these for $300 + , Amazon > less than $20!!

[@ronburns268]

Many years back my AC decided not to work, LOTS of smoke... it was 90 outside, so yeah that is when it would fail. I opened up the cover and when i tried to force it to start it would not. I looked and there was a lot of oil down below the cap. Older high voltage caps are oil based. The drawing only showed the cap with zero spec and there was nothing on the cap. Went to the local AC shop with the drawing and he had no idea, returned with the cap (no marking) and... no idea, but this should work. plugged it in and we had AC again. 2 hrs, 2 trips, $5 part. So if it smokes and is coming from the electrical area and not the fan motor suspect that cap. If you have an HVAC shop around they may save you a LOT of money and likely time!!

[@keithgrayson7685]

Keep things in mind when you see the bill. Your not just paying for the capacitor, your paying for his gas to get there his labor and skill to not only do the repair but to also have the knowledge to diagnose it the wear and tear on his vehicle the company overhead to include the labor for the person who answered the phone when you called. Nothing is free. On average is costs $100 to 200 for the meter alone they use to test that capacitor. There are times a capacitor goes bad that is caused by other underlying issues if the tech is good he will try to identify those issues to ensure in 1 year your not replacing another capacitor. And lastly testing a capacitor like this is OK however testing underload is the best method and will provide the most accurate results (I do not recommend this testing method for anyone who does not have the experience and safety knowledge to preform this test) Edit: I do however highly recommend knowing how to test to ensure a shady tech isn't screwing you over

[@bsintzel]

Excellent tutorial. Thanks for sharing.

[@HowToHomeDIY]

You are very welcome! Really glad to hear you liked it. Thanks a lot for the feedback!

[@timd1833]

Before it got hot, I checked my ac capacitor and it was right on the edge of tolerance. Replaced it with a "MADE IN USA" cap and all is good!

[@Green_Ninja325]

Thanks boss. Changed my capacitor today for 400 less than the AC guy wanted to charge

[@billl3936]

You can test for capacitance while it is still in the circuit and running if you just want to see if it’s close to the Microfarad printed on the capacitor. Read the voltage across common and herm and also read the current going through the wire labeled herm. Take these two values and plug them into the formula. C= 2652* I/V. That’s the current (I) multiplied by 2652 all divided by the voltage (V) will give you the capacitance in microfarad. Of course you can do the same thing for the run capacitor for the fan motor.

[@mvm932]

If a DIY person knows how to measure current, they typically will have a meter that reads capacitance.

[@billl3936]

@@mvm932 For a DIY person a clamp meter makes more sense than a multimeter. In about a tenth of the time it takes you to remove all the leads off of the capacitor, making sure you can remember how to put them back, you could’ve taken two measurements and determined whether the capacitor was still within specifications. If the DIY person is not comfortable working on the unit with the power on then they should probably do it as the video demonstrates. It does seem a waste to buy a meter that is multifunctional and only use it for reading capacitance. Whatever you do, take your time and be safe!

[@williamjohnson9282]

Yeah I got my company to start doing full check up maintenances/cleanings we check the caps and contactors properly. Some will still run out of range but they will be more likely to go, we tell the customer that and they make the decision.. sure theres a mark up, its a business, but it saves them a service call and the inconvenience for a pretty common problem. This saves us from having to go out and just swap caps, all summer and we can get to the more technically involved service calls/repairs You will have to find an honest company that does this. And Not ALL AC contractors are out to get you, knowledge is power, also if you fail as a homeowner to wire this properly or securely there can be major issues, as simple as it is to do... Unfortunately weve seen it done many times by other companies or even homeowners..Its always good to take a picture or to be able to read the schematic.

[@Trainman0401]

Learned a great deal from watching your videos. Thank you. Question…What are some of the symptoms of a cooling system that would indicate a faulty capacitor?

[@IOSALive]

How To Home, I loved this video so much, I had to hit the like button!

[@HowToHomeDIY]

Wow! I am really glad to hear you liked it so much. Thanks a ton for the like and the feedback. I really appreciate it!

[@frankyvee1]

I keep a backup CAP on hand. Helps if it goes bad after normal business hours or on weekends I can replace it myself.

[@BlondieSL]

THAT is an excellent idea!!!

[@nv1493]

I keep spare caps and contacts, they've saved the day on more than one occasion over the years.

[@rnoid]

If your capacitor is fully charged, a good way to damage it is to use the screwdriver to discharge it. You had a multimeter in your hand - switch it to DC and measure the 2 voltages. If there is a high voltage, use a 20k OHM 5w with two alligator clips (well insulated) to discharge.

[@nbrowser]

Eh a couple of springs ago (the season) our central A/C unit wouldn't spin up when demanded on, the mechanic is my was wondering what was wrong so I grabbed a long screwdriver and gave the fan blades a flick and wouldn't you know it, the fan would spin but not compressor action. I surmised it may be a motor starting capacitor issue and pulled off the panel and found it, sure enough it was a three leg unit. Yanked it out and took it down to the local supply store to get a new one, less than $20 CAD later I had a new one. Got it home and installed it and supplied the power back to the system and the A/C fired right up as expected. For less than $20 I had my system running again, saved a service call and the markup.

[@rjg1173]

I’ve replaced 3 of my units capacitors over the years total cost around 45.00 and I always kept a spare on hand, the same with the contactor

[@amtrakusa1]

I moved my capacitor and Micro-air soft start inside into a closet that was next to the outdoor unit. Unit faced west in Texas so just an over compensated super reduced move. Side note: Always have a extra capacitor on hand. To cheap not to.

[@tomdonnelly5659]

Great video and information, thanks!

[@larrys5198]

Just as a matter of good habit, when testing any electrical component, you shouldn't be touching any of the other terminals. This is obviously more important during continuity testing, but as a good practice, you should avoid contacting other terminals while testing.

[@videodistro]

OL stand for Open Loop. A circuit is basically a loop. My dad has worked in electronics since the 40's and he explained this is how the OL came about.

[@johnpicard4909]

Go let all the geniuses in the comments know that keep saying it always means overload 😂. I have heart open loop and open line especially when testing capacitance.

[@chetkasper5680]

Replaced mine last year after 23 years of use. Wasn't expensive. I was told that if I do a better job of keeping the cooling vanes clean (shop vac the system) the cap won't be as stressed and should last longer.

[@starhopper457]

We were taught in RV school to use the multimeter to discharge the capacitor. Set on max VAC and use your probes.

[@amiatroll6347]

Even if the meter is designed to withstand the short, why risk it when a screwdriver will do the job without putting your electronics at risk?

[@sprockkets]

​@@amiatroll6347Because 1. A multimeter has to have high resistance to correctly measure voltage and 2. It's a non issue to begin with - the windings in the motor discharge it already. I've never found a cap with a charge on it in the field. 😅

[@amiatroll6347]

@@sprockkets I agree it's rare, I just don't see the point in insisting it be discharged with the meter. Maybe I am dumb :D

[@starhopper457]

@@amiatroll6347 My CL900 tops at 1000VAC. Even if charged, that cap might be in the low 400's. This is what we learned just in case there are sparks.

[@starhopper457]

@@sprockkets Me neither, but was just relaying what we were taught when dealing with RV A/Cs.

[@duaneeldredgeELDG702]

Had A/C guy come out and tell me my coils were dirty and it was 400$ to clean them 🤦‍♂️ Got up there with water hose and cleaned them and bought 2 cans of coil cleaner for 9$ a can. These companies are definitely scammers

[@RC-nq7mg]

You can leave the common conneted. you only need to isolate one leg of each capacitor segment from the circuit.

[@johnstoker7088]

The % Marked on the capacitor is the manufacturing tolerance. So if you buy a brand new capacitor it will be within those tolerances. It does not as such indicate that the should be within those tolerances to indicate it is either good or bad. Clearly if the manufacturer of the ac unit fits a capacitor of that value as the correct value for the unit then that is what it should be. However bear in mind supply issues, higher tolerance ie small% values are more expensive than lower tolerance value ie larger % values. But if they are unable to source the cheaper capacitors or find a supplies offering lower prices on higher specification unit they will fit those. So if a capacitor is a little out of specification it does not mean it not OK. A previous replacement capacitor may be of a smaller % value because the repair person may have had that with them and would be simpler to fit than get a different capacitor of the same tolerance of the original.

[@2005Pilot]

Excellent Job and content!!

[@HowToHomeDIY]

Really glad to hear you liked it. Thanks a lot for the feedback!

[@Satchmoeddie]

Capacitance is tested as an AC function, and it should be tested at the frequency the capacitor will operate at. DON'T USE YOUR EXPENSIVE KLEIN NUTDRIVER AS A DISHARGE BAR. That is a firing offense when you work on my jobs. (Misuse of tools) Either use some #10 AWG scrap wire and pliers or some scrap wire and add on a 10 watt 2000 ohm resistor so you are NOT making any sparks. Also any capacitor can read perfectly right at 70 uF & 6uF and the capacitor can leak so much DC electricity it's still bad. An ESR and or a dissipation test can sort that out. Electrolytic capacitors also have a shelf life. If it has sat on the shelf for a couple years or so, unused, you can reform it. If it's bulged or leaking goo or leaking crumbly stuff, it's trash. One of my idiot AC techs hooked the capacitor up wrong. Herm was on the fan and fan was on hermetic. The unit rattled all of the windows on the house. There was a full board and unit schematic inside AND a full cartoon wiring diagram inside of the unit AND he had an I-Phone, and he still got it hooked up wrong. The owner's dropout frat boy son.

[@fresh1272]

Awesome 👏🏾 thanks 🙏🏾 it was capacitor glad you made video

[@QUIX4U]

I "like" the fact that the made in the usa "model" also has an internal connection diagram, to allow the end user "to see what it does", electrically.

[@b2major9th]

Basic electronics. Cannot generally measure component values while in the circuit because other components connected affect the values you measure, leading to confusing results

[@tedbush1870]

You are right in what you are saying, I owned my on motor shop and have tested many capacitor s that people have brought in because of videos like this, some bad some good, I had a capacitor tester which is simpler, that being said you are trying to tell people to diagnose their on ac which is not good if you have no ideal what your doing.

[@NicholasKoeppel]

The thing that sucks is… having to wait for the new capacitor to come in the mail… Also, while your unable to keep your house cool in extreme temperatures; older appliances and pipe fittings(condensation) can cause a kind of domino failure effect; which can feel a bit like your “cursed”, lol…

[@jackspencer8290]

You know, I've seen this same idea posited on other YT channels, and I have to say that - with the exception of an actual scam, where they are telling you to replace a part that is not bad - it is not unreasonable to be charged several hundred dollars for this fix. Let's assume that this part being worn out really is the problem. Well, opening up your A/C unit and diagnosing that problem is part of what you're paying for. The labor involved is part of what you're paying for. The part is part of what you're paying for (and yes, it's an inexpensive part). Another thing you're paying for is making sure it's done right, and hopefully checking out the whole unit (Is your freon full? Is your insulation in good shape? Connections?). Pointing out that this part is inexpensive reminds me of when I was in junior high, and kids started realizing that "the store" pays a lot less for merchandise than what they sell things for at the register, and then railing about it. Yes, they do indeed. And they have overhead, and employees, and this, and that, and the other thing. As I said - if you're being scammed, that's another matter, and another conversation. But if the part is actually worn out - and it DOES wear out - then there is nothing outrageous about paying a pro some good bread to replace it. It's how it works.

[@junkie2100]

need to get one of those multimeters that does farads, mine dont sadly. i dont work on hvac often, but when it breaks im the one who has to fix it lol. just replaced the motor and swapped a capacitor on the blower a week ago

[@kraftaculousgreekgodofcraf1113]

Ok riddle me this… my capacitor reads perfectly within tolerance; except it’s covered in like oil spray ? Like kinda oily… And there’s something that looks like honey or sap under the top rim. Also my capacitor is just being hugged by an extra wire, there is no metal harness holding it against the metal… Also thanks for the video always learning from you!

[@MrPinpoint007]

The two multimeters you recommend are similar in price. Is one vastly preferable to the other? Thanks!

[@nickminneti825]

My repair company tech encouraged me to do it myself. Now, when i get the annual service, i always watch the cap test. If it gets low, i replsce it. Just for the fun of it, I've got a spare for both my units. Got them on amazon. Edit: Oh, almost forgot: take a picture before you start. Getting the wires crossed would be BAD.

[@JR-ve9ij]

It's great how they cheap out. The contactor is for 220, but it only has one pole contact. The other side doesn't break. It's prone to failure faster than a true 2 pole.

[@HowToHomeDIY]

It is true. The other side is shunted.

[@jimw544]

Love your videos. Do you have one that explains the contractor?

[@micahtron5000]

I was quoted $400 to replace my swamp cooler pads. I got a nice ladder and harness instead.

[@stevelux9854]

Always put that disconnect plug in your pocket when working on the AC. Leave it laying around or on top of the disconnect box and someone could either take it or plug it back in. The only way you know for certain that you are safe is to have complete and total personal control of the plug.

[@mossy723]

I usually FedEx mine to my friend the next state over, you can never be too safe.

[@martylynchian8628]

Do you know if there is a way to connect your air condition via wifi or Ethernet cable plugin, to do basic troubleshooting and resetting the system? For example, for a remote location property or warehouse? Thanks.

[@billymadison7331]

spring tuneup, the tech should be testing the capacitor, and if its below the rated threshold it will pop on the first 100 degree day....