Faulty Microwave Capacitor Diagnosis and Replacement

BEFORE REPLACING THE CAPACITOR, ALWAYS SHORT IT WITH AN INSULATED SCREWDRIVER. THIS CAPACITOR IS CHARGED TO A HIGH VOLTAGE.
In this video, I show you how to diagnose and replace a faulty Microwave Capacitor. If you are wondering why the microwave fuse board blew up, it is because one of the interlock switches did not open. I also had a screwdriver stuck in the fuse holder so I would not blow my only fuse.

[@whenifeellow]

how about putting the part about discharging the capacitor at the beginning of your video... Jeezus.

[@robstone5333]

Right. Unbelievable.

[@thecontinentalmarine2294]

Thats the whole reason I clicked this video lol, great idea

[@stillwill1808]

Because just telling you about it at the beginning of the video doesn't really grab your attention in the same way as reaching way back in there and grabbing hold of a live cap you were not expecting. It'll lurn you reel gud.

[@luisvilleza2687]

Take care dude and keep safe whenever your dealing with any electrical or electronic device have a nice day

[@tonic.1871]

a bit fast but very clear and educational!

[@randybelluardo4920]

DEATH is a clear education! This guy said NOTHING about making sure to discharge the High Voltage Capacitor. You don't get a second chance with all the safety issues you ignore.

[@justingillette8287]

A capacitor can’t take 2kvac and convert it to dc and ramp the voltage up to 4kvdc. That is just not a thing. A capacitor is neither a rectifier or an amplifier. You can use it as a filter to block high frequencies in ac but you will not get dc out of it no matter the spec

[@troy3456789]

True facts. It passes AC (with a shift by 90°) and blocks DC current flow.

[@franciskissipe2960]

Thanks alot i just fixed mine

[@raymonddaisy2538]

Well I’m glad I’m not the only one who is wondering why he didn’t discharge the capacitor before removing it, and from what I was told it isn’t suppose to be tested with a digital multi meter either

[@M0UAW_IO83]

That capacitor can kill, the internal discharge resistor should not be trusted, always discharge the cap yourself before you attempt a repair.

[@ThePreyMantas]

Trust NOTHING, always error on the side of SAFETY...! Adolecents are so impetuous, we were there at some point and some need to burn (or fry) to learn. Did you notice at the end when he got bit, the huge burn mark # 7:54? He's having "fun". :)

[@zamyangzangpo3622]

How can we discharge the capacitor?

[@vanrijn1669]

You’re going to get someone hurt to put this on the internet and not show that the capacitor should always be shorted before going anywhere neat it. You poked your hand right onto that capacitor when you started. Your familiarity with these components isn’t what most people experience. Stay safe.

[@robstone5333]

Thank you for commenting. You may have saved a life. I was wondering if he had discharged it off camera, then failed to mention it.

[@Z-Ack]

Yea godamnit.. wish he woulda said something.. i took it out to test and miss kitty happened to want some lovin and now i got to figure out how to convince the mrs. that her cat ran away... poor little things stiffer than a mormon on his wedding night.. didnt even make a sound, like static electricity pop and god claimed her.. rip mrs fluffles... 13 years shes had that cat.. looks like no pussy for me for a while and here i was fixing the damn microwave so i could get some handyman tail... son of a bitch..

[@darrenashley126]

I just commented how that drives me mad when safety rules are missed. Good to see that I am not the only one to pick up on this, :)

[@sergeiglimisRV]

Agreed very irresponsible 💀😭

[@EgyptCanada]

Testing a microwave capacitor after removing from the appliance without discharging it, would damage the multi meter and hurt the technician.

[@Ziggerzzz]

Always short out the capacitor before doing anything .. Engineers have died that didn't do this first

[@AlexeyZubkov]

what about regular human being?

[@TheRebuilt1]

I was wondering the same thing, I know those capacitors store a lot of voltage even if bad. I was hoping this guy wasn't going to die during this post. Touching capacitors working on these electrical components barefoot.......

[@ThePreyMantas]

I'm surprise he doesn't smell like chicken...

[@chitibusu]

@@ThePreyMantas he was lucky...this time

[@warrenward3630]

Dying is underrated...

[@trankt54155]

I worry for you. The way you handle electrical components-especially the capacitor-tells me that I would not be surprised with you ended up dead with electrical shocks. Slow down, exercise some safety and have some respect for your safety.

[@rickjondo1343]

Yup. Fool thinks he's building a microwave out of fn Lego. Stupid

[@johntrimble3101]

its his gig, heck think thats bad i ride a motorbike, , ,in houston, , , ,an im 63, , , ,now thaT IS GENUINE STUPIDITY RIGHT THERE. ?/??

[@jimmitchell8357]

@@johntrimble3101 uhh.. what?

[@carlchilders2154]

@@johntrimble3101 I'm 64 with a honda sportbike. Nothing stupid if you ride with common sense.

[@arianad1157]

@@rickjondo1343 don't be rude good god

[@ZappninLLP]

Barefoot on concrete, working on a plugged in appliance.....are you trying out for a Darwin award?

[@ThePreyMantas]

He wants to smell like chicken....

[@robstone5333]

Surprised he wasn’t standing in a puddle of water.

[@cliffright1142]

Congratulations, you’ve done everything wrong regarding potential shock. Trying to help people that don’t know the potential for danger is reckless at best and just plain stupid at worst.

[@edwardmissouri2216]

I don't doubt that you know how to repair this microwave, but you need to re-do this video for safety reasons. People not familiar with the danger of capacitors could be seriously injured or killed because they didn't discharge the capacitor. Don't ever assume it has bled off.

[@jonichin4661]

And you should know, people who are not familiar with HV capasitor would not have courage to try to repair a microwave.....😂😂

[@rscelectrical7091]

​@@jonichin4661 : Really ?, Seems you know very little about the stupidity of the human race .

[@raphael9205]

At the end of the video he discharged it

[@serapozburun7752]

Is directly connecting both ends of the capacitor a correct way to discharge it? I honestly don't know but I presume it should somehow explode or at least show a nasty pop! It's written on the note that there is 5kV around the capacitor after all. That pop should be a nasty one.

[@ajeyakumarsharma7378]

You can insert a resistive load to discharge the capacitor . Simple term insert an incandescent bulbs 😊

[@foamaxmore]

... unless you want a real powerful punch in the chest or hands you must always short out a HV,... especially Microwave capacitor before taking and Multimter readings,... it will surely fry it!!! !Same goes for TV and computer monitor caps....Stay safe!

[@henryswan1374]

Usually discharging the cap is unneeded because it has an internal resistor to discharge after use

[@ThePreyMantas]

@@henryswan1374 NEVER ASSume ANYTHING is the golden rule to safety.....

[@toddt6730]

I'm glad so many commentators are aware of the dangers involved in opening a microwave and the capacitor, it actually has a bleeder resistor built in, but they do fail and that's why, as many people have mentioned, that you should take two well insulated screwdrivers and short the contacts one at a time to the frame, then you can disconnect the capacitor, mostly at the shop we do these kind of repairs under warranty, not worth the labor otherwise, cheaper to buy a new one

[@humble5190]

Dude! You are great at explaining the process but you should think about the safety of whoever is watching your instructional video. Not discharging the capacitor, standing on concrete in your bare feet with the electric cord from the microwave hanging from a water spigot could cause someone not familiar with the dangers of electricity to get seriously hurt or killed. I would recommend taking this video down and doing it over. It's very insightful. Thanks for the info.

[@UpgradingJeff]

The only thing that he should do is cut the video up and add the last part at the beginning as a disclaimer.

[@IAMElectric369]

I’ll go out on limb and say, if you don’t already know to do that, you have absolutely no business fooling with this stuff. If you get shocked, it’s either an accident of complacency or you didn’t research what you’re doing and needed a zap to remind you to do so. Or maybe it was one too many pulls from the green corn. Nevertheless, this kid knows his shit.

[@scrubbymcgee2]

One of the handy parameters on the side of that cap is where is says "DANGER H.V." -- you should make note of that one.

[@darrenashley126]

Always always always discharge your capacitor first. Drives me mad when I see a safety rule missed out. I see it said in the description but not done on the video/

[@SkyWire88]

He probably should have marked the bad cap immediately with a big "X" so he wouldn't mistakenly re-install the bad cap. Especially because he had an identical cap in his pile of used caps. Just sayin' .

[@ChipGuy]

Barefoot outside with shorts and t-shirt. Must be in southTexas or Florida. Can't wait for the weather getting like this here in Germany as well. Won't happen before May, that's for sure. It's so dull an miserable at the moment. Stay safe with mains and HV, please!

[@thecongo8505]

Always discharged the capacitor ... capacitor may hold thousands of volts ... not discharging it could be dangerous

[@cat-lw6kq]

EEEEE...I can't watch this, my co-worker forgot to discharge a cap like this and got zapped, I saw it happen.

[@Z-Ack]

Did it make him poo a little?

[@chitibusu]

The way you handle electrical components-especially the capacitor-tells me that I would not be surprised with you ended up dead with electrical shocks. And you forget to discharge the capacitor! And you forget to show us how to measure the good capacitor. DISLIKE!

[@barneylan876]

You are NOT professional !!!!

[@yeyolara6259]

You didn’t test the replacement capacitor before installing it ?????

[@troy3456789]

Yeah, that seemed odd to me too. See the needle move showing what looks like current flow, then slowly go back to infinity resistance. I prefer analog meters with needles for capacitor testing.

[@johnoconnell131]

we all appreciate your knowledge and skills. However, you were speaking too fast for some of us. second thing was the view of meter was blocked when you tested fuse and meter reading not visible when you tested capacitor...slow down, we know you are smart and glad you made this video...

[@DasdeutschesBand]

It even says "DANGER H.V." on it.

[@fredericka.furmansr.2489]

Didn't short the capacitor. And used an old capacitor. Bad example for beginners. Ouch I just got shocked

[@enzofitzhume7320]

Please Remove This Video.

[@BruinHerr-bj7uk]

I’ve found the best way to fix a broken microwave in 3 steps: 1. Unplug broken unit. 2. Take it outside and throw it in the dumpster. 3. Buy a new one. I’ve found this to be the most cost effective approach.

[@paulmeynell8866]

I like the video but watching you point and touch in high voltage scares me. And bare foot, you must have a death wish. The most important point is discharging the capacitor, and don't short it discharge it properly.

Maytag MMV4205AA Built in literally smoked 1/2 of transformer... not sure why ..but since there is no transformer to buy to replace (2005 micro) came close on Ebay but did not match the: 6170W 1D00C on trans.........

[@seckinseckin3919]

1,1.05,1.07,1.10,1.20 microfarad.. all are compatible caps.. no problem to replace with these values..

[@thobui9]

Safely first ! Unplug power cord from AC outlet.Discharge capacitor pls . You can do the job easily but viewer CAN’T . Please mention in your video with warning safety .

[@wonderwond]

mine has a very odd issue, when its been working a while and lets' say either loses power in the house or comes unplugged for a hour or so, then comes on, none of the button work, they just beep, cant cook nothing, it has to have constant power for about an hour then the buttons start working again, kinda like a capacitor having to build up power first or something else, i dont know alot about them?

[@NTSRFR4]

What caused that big black burn spot under the where the fuse is? It wasn't there before you shocked yourself.

[@wallychambe1587]

I noticed that also!🤩🤩

[@saigonaisnhatrang762]

Another guy showing off his "knowledge" without helping anyone learn anything.

[@wallychambe1587]

What is that black spot on the board after you got shocked??😁

[@christianjensen5523]

Thumbs down.

[@bobodyuknow]

That aint a voltage doubler circuit. The diode is half wave rectification as the magnatron runs off HVDC

[@TechTed1]

the capacitor is just a high resistance dummy load resistor for the magnetron the diode (high frequency generator) the capacitor determin if magnetron is raised the current and it blow the fuse if you use a bigger current fuse or directly connected fuse if the main outlet is raised the voltage the voltage in secondary will also rised and burn your capacitor and magnetron

[@allfordogs4421]

This is the only video saying no continuity is good in capacitor

[@Brent700]

If the diode has continuity does that mean it's still good...fuse is good ,and capacitor doesn't have continuity.... So it's good also.. thanks

[@Cheepchipsable]

LOL, notice the black scorch mark on the board he replaced. 🤣

[@amitlec]

thats reminded me to buy latex glove! thanks.. 2100 v. is surely giving me erectile dysfunction

[@seckinseckin3919]

they say discharge the cap before repair but one end of capacitor already connects to chasis through diode.. what is the point ?

[@mozee01]

why dont u show how to test the diodes with the multimeter showing the readings. Ur confusing the process. Just connect the multimeter and show the reading. Show a one that is good and show another that is not good.

[@applejacks971]

talk too fast and never show where your multi meter is set. thus pretty worthless to someone that doesn't know what they're doing.

[@2you24tube4]

'You don't discharge the capacitor....or even warm viewers of the voltage. You shouldn't be posting.

[@1959Berre]

Indeed, this guy is reckless. A charged cap this size is not a joke.

[@ThePreyMantas]

Well, he did... AT THE END OF THE VIDEO. Obviously he doesn't take safety seriously, it was an afterthought. He's a back-end kind of person putting the most import things last and impetuously, although probably well intentioned, offering irresponsible advice. He needs to look at viewers when his videos as completely uneducated and always think about their safety.

[@NeoJakX]

if anyone is thinking about fixing their own microwave please take it to a professional, capacitors like that will kill you if you don't know how to handle them. even if the microwave is unplugged many people have died because of this.

[@troy3456789]

A hundred trillion have already painfully expired just from following this video and reading your comment ☠️

[@BM-jy6cb]

Or even better, use common sense and don't work on electrical equipment barefoot on a concrete floor!

[@nld-bl5ct]

Radio Shack Meter...wow, you had that for a while!!

[@BenjaminEsposti]

Be careful, you should set the current limit on the power supply otherwise you will fry the diode.

[@TannerTech]

+Benjamin Esposti I had it set for two amps, thanks though!

[@jozkie]

IMPORTANT!! DISCHARGE CAPACITOR FIRST FOR SAFETY!!

[@TechTed1]

rule no 1 do nut discharge the capacitor die for the science 🤣🤣🙄

[@bobtucker4738]

This video should be taken down.

[@rahmanmokhtar2474]

This microwave Don't have a H.v fuse.

[@amadoujallow429]

Why you did test the capacitor you replaced

[@iamdrambuie]

Why didnt you test the capacitor as a capacitor and not as a resistor?

[@Ezq95]

slow your roll man. you are going real fast. great inf. but I cant catchup

[@stevegrubbs866]

Mine sparks in the middle on the bottom

[@standtall7646]

Sooooo..., why did the circuit board get burnt? Was that from your shock? That's a lot of volts to do that burn. Thx

[@KerryLynch-ku9lb]

Amps (flow) burns, Not Volts (potential)

[@allydog3452]

PLEASE REDO THE VIDEO! Most people will just watch it without reading your note above. They can get hurt or killed if you don't make a big deal about the importance of shorting the capacitor IN THE VIDEO, not a little note below it. My guess is you could be sued as well.

[@shamielsolomons-cf1kw]

Mus it be the same model cpacitor

[@wallychambe1587]

I have one that I think the thermal sensor is bad or the fan quit. I put it on reheat and just as it is finishing up the display goes out and then a couple of min later it comes back and says PF like it has had a power failure??

[@bg-zw1kk]

bro had room for 1 more magnetron🤣🤣

[@tshepogabanakgosi744]

Hi,,my microwave burn the fuse that comes from the capacitor so it doesn't heat the food could be the cause for it?

[@troy3456789]

@05:03 why don't you test the replacement capacitor to show what a good capacitor looks like with your meter?

[@glennphelps9300]

I agree. Most of this video is a hack job.

[@eemann007]

I have a 2006 Sunbeam Chinese made microwave with a repeatedly blown fuse. The Capaciyor is a 2000V model and all the replacements via Amazon are 2100V models. What happens if I replace the 2000V model with a 2100V model?

[@papanono2463]

Transformer making noise when I plug it in. Unless I open door. Also trips breaker. Checked door switches. Look good. Any suggestions?

[@CamilleSkiff]

Can this repair be done while the microwave is installed over the counter? I have an LG model lmh223dst.

[@edgeGabe]

Onto my 5 fuse retry. My high voltage fuse blew when it died. Replaced that, found the top fuse was dead, replaced that, then blew the top fuse again. Was lower A thought that was it bought the right 10A fuse blew again. Tried again to confirm (double check everything is in place). Time to invest in a multimeter.

[@AlienRestoMod]

Good job Tanner. That is a lot of capacitors, where did all those microwaves?

[@TannerTech]

+Alien RestoMod People leave them on the side of the road on trash day all the time. I just pick them up and gather them for parts.

[@breesdad50]

Hi Marco, you wouldn't believe what people throw out on the streets in USA

[@tripjet999]

Shock you dead.

[@rockgelio10]

He does say about discharging the capacitor at the end of the video!

[@T2D.SteveArcs]

The chassis is ground its just the positive is grounded so like you said the magnetron receives -5000v reference to ground.....

[@dk.650]

Capacitor Discharge. If someone follows your video and they are shocked you may be in for a shocking surprise.

[@puddytat62]

Good testing with metering. My mw had some switches that needed replacing and now it works but the fans seems to not be working. Cannot be the fuse or capacitor. Never heard of a fan going bad. Maybe Mis wired

[@ajeyakumarsharma7378]

Thank you verymuch for engineering schematic diagram . No service person has shown rhis till date .

[@josepeixoto3384]

*GREAT VIDEO* Now i'm gonna fix my microwave,stopped heating yesterday; I'll put 2 insulated screwdrivers(or one if it fits) across that capacitor...anyway...

[@luclafor]

Yes, to avoid injuries, you have to discharge the capacitor first. You can do that by touching both ends of the capacitor terminal simultaneously with a pair of insulated long (needle) nose pliers, but be very careful not to touch the metal portion of the pliers though. Here's how to do it here: kzbin.info/www/bejne/hXbIpWuJgNiFmZY And see what could happen to you if you skip that step: kzbin.info/www/bejne/d2rcp4iYjMqnjq8

[@omerhomerski1602]

thanks, God bless

[@luclafor]

@@omerhomerski1602 - My pleasure, sir

[@clintrichardsonclintfromny203]

Did your microwave start getting louder and making a humming vibrating noise before the capacitor went? Mine is doing this. I suspect the magnetron is starting to go in mine.

[@ryk1265]

Why not use a multimeter that has capacitance test feature to make it more accurate? I see this one has 1.10 microfarads.

[@TheDellypower]

Is doesn't matter which end of the Capacitor the diode and the magnetron are plugged into as long as they are plugged into the same end and the Transformer in the other end, correct?

[@KerryLynch-ku9lb]

correct since it is not a dual capacity capacitor

[@johnlinn9297]

What were the original symptoms? Not heating? Lights and control panel dark?Mine seemed to be working but sounded loud and wasn't heating. Additional short attempts to heat - like 15 seconds at a time weren't working.....then I heard a pop, then all lights went out. Suggestions?

[@aa-ron1596]

Hi, my microwave does not power off but it does work, it makes a buzzing noise and will eventually trip the breaker. I am replacing the megnatron, do you think this is the issue?

[@asifrana5392]

Thank you nice video and info. please tell me that CAN WE REPLACE BAD MAGNETRON WITH GOOD ONE OF ANY MICROWAVE OVEN

[@shajik.damodaran8156]

Discharging the capacitor should have been told in the introduction itself, you did a very risky procedure, endangering other diy mates .

[@TannerTech]

I realized that right after uploading. I made sure to make that fact extra clear in the description. Thanks!

[@kuldip2604]

Really nice video thank you. So i was hearing up my cup of milk for a minute and suddenly after 30 sec i smelled something was burning. So i tested again and it did not heat up anything. I opened the microwave and removed the fuse and put back the same one and it was heating up the milk now but the smell increased this time from the fuse plate. I dont know I just need to replace the fuse or capacitor could be gone too?

[@TwoDudesPlay]

my dad use to throw these to me when he was fixing his older cars give you a good fright, would kill you on newer cars.

[@TannerTech]

Haha, very true. I was fixing an old film camera today and got quite the jolt from the 300v capacitor.

[@TheZombieSaints]

Those microwave caps have got a nasty bite, hey :) great video as always mate .👍

[@robstone5333]

Your comment is contradictory. But then again, so is “ZombieSaint”

[@thesultanmerchant]

you did not show how to discharge capacitor which contain high voltage.

[@noelv1976]

Reading the comments: y'all the real heroes 🙏 as my instructor always says, "Safety first!"

[@azadsree]

Hello on my microwave 5kv 800ma fuse, if replace with 5kv 900ma is ok?

[@TannerTech]

That should work

[@cowoganteng3776]

👍👍👍🙏🙏🙏

[@learningappliances8941]

Always test a capacitor like a 9v battery. With your tongue.

[@TannerTech]

Lol, good way to loose your sense of taste. Especially if the cap is a high voltage one.

[@LukaszPiwowarczyk-s1m]

😮

[@sidahmedguemra9139]

❤👏

[@jimmynguyen7300]

Hi please help, the moment I close or open the microwave door the fuse blows