How To PROPERLY Flush and Recharge A Contaminated AC System.

[@RepairGeek]

Tools used in this video: Aerosol Flushing Solvent (at the minimum you'll need 2 cans): amzn.to/3CHaazN Professional Style Flushing Canister: amzn.to/3AfnVCD Flushing Solvent for Professional Canister: amzn.to/3dMGpTy PAG 46 Oil w/UV Dye: amzn.to/3AGIIk4 PAG 100 Oil w/UV Dye: amzn.to/3pDHVdp PAG 150 Oil w/UV Dye: amzn.to/3dEstLc R134A Manifold Gauge Set & Vacuum Pump Kit: amzn.to/3AFHmWI R134A & 1234YF Manifold Gauges: amzn.to/3T9LlCb Vacuum Pump: amzn.to/3A8YgM0 Can Tap:amzn.to/3T7is9I R134A Refrigerant: amzn.to/3dDPluj 1234YF Refrigerant: amzn.to/3KiejvO My Amazon Store: www.amazon.com/shop/repairgeek Help support the channel, buy using my Amazon links As an Amazon Associate I earn from qualifying purchases and your cost is exactly the same. Oil type and quantity information: supercool.ac/ -Click Resources -Click Lubricant Specification Guide. -Enter Year, Make, Model.

[@blh3741]

I would like to add one thing that you didnot mention... When you hookup the refrigerant can to the yellow line, you need to bleed off the yellow hose by loosening the fitting at the manifold guages until the refrigerant comes out, then tighten the line. Not doing so adds outside air back into the system that is not supposed to be there. It basically defeats the reason for vacuuming the system. Outside air isn't coolant and contains moisture and moisture and refrigerant becomes acidic=bad

[@RepairGeek]

@@blh3741 my manifold gauge set has what are called "low loss" fittings. The end of the yellow hose has a schrader valve inside like a tire. When I disconnect the yellow line from the vacuum pump, the vacuum is held. The only thing that could have introduced air is the can tap that I transfered from can to can.

[@williamcawelti505]

Finally, someone with integrity who can actually admit he screwed up, as opposed to blaming it on someone or something else or making up some bullshit story. Then he goes in depth explaining the entire AC system. He explains what and what not to do.

[@DoktorHalloween]

I am a DIYer and this removed so much of the mystery around AC systems. And your links are exceptionally thorough. Thanks, and great job!!!

[@tomsiri1960]

out of all car a/c video yours is the most comprehensive. well done. thank you.

[@ozzstars_cars]

For DIY'ers that might not have much of any a/c experience listen to the info in the video. Spot on and excellent info to guide you in the right direction! Nice work.

[@charleswade4331]

Very helpful

[@applecider6951]

Probably one of the best and informative ac videos out there. Very knowledgeable content and it shows how to do things right. I am retired ASE certified Master tech for 35 years. Could not have done this video better myself 10/10. Great job.

[@tasaman]

Two days ago my compressor went out. Tomorrow im on the way to the junkyard. New replacement is $400 so im gonna do it cheap first. This video gives me a lot of the information i needed. Thank you

[@cemomaher1650]

So, how was succesfull your repair?

[@leggoego]

I've been on YT since the start, and I've watched thousands and thousands of how-to videos across hundreds of disciplines from myriad creators. I can confidently say your style of content creation is among the most concise and thoughtful on this whole platform. I'm glad I found your channel. Thanks for all you do!!

[@هيمولوف]

All hail to you, my dear brother...and we thank you for your diligence and guiding you in the right ways, and you deserve all the appreciation

[@michaelp3650]

Done Right... Short and Sweet... Most informative... Most Educational... Great Job on format and presentation. NO LOUD MUSIC... Again Great Job....

[@gstatz9062]

Hello! It's by far the best video on AC. A few questions: why should some of the oil in a compressor with a fixed stroke go into the circuit? Like a variable lift compressor, the fixed lift compressor also has a swash plate. Both need to be lubricated. What should be lubricated in the circuit? The only moving parts in the circuit are the valves on the compressor, which do not require special lubrication, and possibly the expansion valve. The dryer consists of a surface, for example granules, onto which moisture is absorbed. If this surface is contaminated with oil or is even covered with oil, moisture will no longer be absorbed. In my opinion, oil in the circuit is oil from the crankshaft housing which over time gets into the circuit along the pistons

[@brandyballoon]

The oil is continuously circulating through the system when it's running. It doesn't stay in the compressor and it doesn't cause any issue with the dryer. The dryer is designed to remove moisture from the oil, because PAG oils are hygroscopic and any moisture in the system will be mostly in the oil.

[@jameskoecher6036]

Great video, one observation :when charging with 1lb. cans, after attaching can tap and opening can tap valve to each 1lbcan it is a good idea to loosen charge hose at gauge manifold slightly to let tiny amount of refrigerant to exit to purge hose of any air that entered during attachment of refrigerant can before opening low side manifold gauge.

[@RepairGeek]

This manifold gauge set has a check valve in the end of the hose that connects to the refrigerant. So when I disconnect the yellow line from the vacuum pump it will hold the vacuum.

[@johnny23toronto]

@@RepairGeek great video. But if there is a check valve in the yellow hose, then how could attaching a can to it push Freon in the other direction? Wouldn’t the check valve stop that?

[@RepairGeek]

It's a Schrader valve actually. That's the same valve that is in the stem of a tire. You can fill a tire and let air out of a tire using the same valve. It's the same concept here.

[@repairitdontwreckit4257]

Subscribed!

[@CaseTheCorvetteMan]

You may have made mistakes first time, but the man who never made a mistake never made anything. Really good video mate 😊

[@twincam825]

Purge your line from your can to manifold before opening to charge. Good info on freon with leak sealer and added oil will cause nothing but problems.

[@sergiocampos1822]

Awesome video. I only needed to see a segment of it and ended up watching the entire video. Very thorough, probably the best auto repair video I have ever seen. Thanks alot.

[@johng.4959]

Very good video! You touched on many points and I would recommend anyone doing this on their own research..research...research! (I learned the hard way also!) I recently had a compressor replaced on my 2001 Buick and neglected to change the drier, condenser, orifice tube. Mistake!! Changing-out the compressor "ONLY" was a huge NO-NO. The shop that changed it out really didn't inform of the negative aspects of everything involved. Ultimately, I ended-up doing everything (Including a flush) on my own. Also - I was under the impression that compressor hoses (Like yours, with mufflers) were not to be flushed? Interesting. I'm glad your A/C is working! And lastly... Thanks for not falling for all the A/C refrigerant marketing crap! Use only 134-a and don't fall for all those sealers etc. Thanks!

[@sumterlb]

This is hands down the best tutorial regarding replacing AC components. God bless you for this.

[@changchunkit3883]

Your videos is one of the best so far, very informative, now we know one or two things extra which we don't at all, TQ

[@ScottSanson]

Hands down best explained video I've ever seen seriously thank you

[@lilTryhard]

I thought that surely after all that work you would measure the charge from the cans using a scale. I've always heard that using Hi/Lo pressures alone is not accurate to determine the correct amount of charge in the system. This video is a great resource to DIYers!

[@RepairGeek]

The car's refrigerant capacity is 34 oz. 3 cans is 36oz. I just dumped in the 3 cans and ran it. Works great.

[@lilTryhard]

@@RepairGeek Nice. It doesn't always work out so neatly... mine is 19oz

[@RepairGeek]

2 extra oz of refrigerant won't have any major side effects long term. The cooling capacity may be diminished very minutely but systems only leak over time. I was going to have more aggravation finding a scale, weighing the can, and trying to get precise over something that isn't going to cause any giant issues. If your system takes 26oz you can't put 36 in it expecting it to work correctly. I am just fortunate with the capacity of my system vs. the capacity of the cans.

[@bobbyhempel1513]

If I don't have the black Gunk you're speaking of and the only problems I had was a sticking expansion valve and a bad clutch on the compressor do I need to change the condenser and muffler?

[@bryanwood9285]

@@RepairGeekYep. The gauge set and hoses held 2 to 3 oz. that didn't get into the car.

[@EdvinQuintana]

I don’t speak English, but! You’re video helped a lot, it easy to understand. Gracias carnal

[@hotrodray6802]

FYI We recently installed a new AC kit. Had an undetectable leak. No dye anywhere. Held perfect vacuum over night. Held 125 psi of pressure over night. Hook it up to the 175 psi compressor and found a bad hose crimp. Dont overlook the simple things. KISS. Weve always used lacquer thinner for flushing. Cheap, dries out easily blowing air through. Never had a problem. Also its easy to add an inline filter at the expansion valve and condenser. They sell little cone shaped filters that slip into the connection fittings. Couple bucks each, slip right in.

[@Fonst1960]

Thank you so much , excellent video , I have the same problem of a dirty contaminated system, my car is a 2005 Ford Freestar Van, I have both expansion valve systems, because there is a thermal valve in the back, that Van has an evaporator in the back for the passengers, I cleared up many doubts with your video and I gained a lot of information, thank you very much again ​

[@chrisspanyer1525]

Great video as always. Thanks. Don’t use shop air to break vacuum. Use nitrogen instead as it’s dry gas. Shop air will introduce water into system

[@xpert_kid_one730]

Would a compressor with a drier resolve this?

[@rohitbhatnagar7599]

Thank you for the video. You are down to the point, straight without all the BS from other videos.... 💯

[@silasspencer9858]

You’re the man. Thank you so much for all this information! Thankfully my shop is letting me utilize the ac machine for recovery, vacuum and recharge. Side note I also will be doing my water pump at the same time 😅 Keep posting, please!!

[@urpourvelo7669]

Thanks for very good video! I would recommend to have shutoff valve right next to the vacuum pump in the yellow line. Without that you will have some air with moisture in the system.

[@jasonswearingen2297]

Fantastic video.....great attention to detail.....much thanks to the significant amount of your time expended.

[@truthurtzjc]

Your the Man, dude. Great, informative content. You touched on every single point needed to attempt this repair. Thank you👍👍👍

[@thebudgettrackjunkie]

Thank you for this! I'm currently replacing the entire AC system on my S2000 minus the hard lines. It helped to see how you were flushing your lines out and i have that exact aerosol solution you used as well. Replacing my evaporator core, expansion valve, drier, condenser, compressor, and high/low hoses. Only thing i'm keeping are the actual hard lines so I wanted to make sure I got those cleaned out properly.

[@leenevin8451]

Is it ok

[@technicalgeral5849]

All good,good knowledge,but one thing did not show the air purge before cracking the charging valve,may be u did but not shown Ibelieve .thanks for good demonstration.God bless u.

[@Leto4900]

You said an important thing No matter of which gas brand you charge your system as it working properly and no it has no leaks... Golden advice to anyone living in hot. States dude. Thanks a lot for sharing us your experience on this issue. I'm glad i knew recently that cleaning the evaporator also is a waste of money and time just buy a new one instead. Thsnks again from 🇸🇦

[@geraldmartin3625]

The Supercool website tip is A#1. Thanks dude!

[@tonyw3523]

Extremely HELPFUL video! Thank you!

[@mah1634]

Thank you for your thorough video. It helped me understand the process clearly.🎉

[@TS-qd2uj]

Excellent training video, excellent pointers. Thanks!

[@RxRau-kg9ot]

I hate it when I mess up working on my car, when I could have paid someone else to mess up my car.

[@CarlManning-y4l]

Preach it Brother

[@TEKNIKO65]

Disfruté su presentación altamente informativa y paso a paso; aclaró muchas de mis dudas sobre los lubricantes. Me ayudará enormemente cuando recargue mi sistema. Desafortunadamente, la humedad no se puede eliminar del polietileno/polipropilenglicol aspirando, incluso durante períodos prolongados, ya que estos polímeros son extremadamente higroscópicos; La única forma es mediante tamices moleculares 3A/5A (idealmente activados a 250 C en alto vacío) o agentes secantes (CaSO4 anhidro, Na2SO4, KOH, etc.). El objetivo de la aspiración prolongada es eliminar la mayor cantidad de aire posible del sistema. Los restos de agua restantes son eliminados por el gel de sílice presente en el acumulador/secador.

[@royb2251]

Best vid on air con flushing I’ve seen so far 👍🏻

[@tedthornton7791]

Oh yeah A plus for honesty. Says alot about your intregity.

[@warrenmoore3006]

Outstanding Presentation, awesome details Thanks 💥

[@JoshuaTrenge]

Advice… Bleed the air from the charge hose before opening the manifold valve… maybe you did that and didn’t mention it…. or I missed it? Great and very helpful video….

[@watchdogu.s.a.8973]

I was watching for him to do it but didn't see a way on his manifold set to bleed the line other than possibly cracking the line open.

[@xrumba]

Love your video! One question .. how much psi for the compress air in the evaporator? I’m scare I’ll brake it lol if the air is to strong.. 😅

[@RepairGeek]

You won't break it. The pressure of the refrigerant when the system is charged and not running is greater than the pressure you'll see with a home air compressor.

[@breakbollocks9164]

Very well done! Thanks!

[@chrisflowers4265]

Excellent tutorial! keep up the good work.

[@coldjello8436]

Thanks for making this video.

[@georgeantonaros5580]

Great Instructional Video !! 🤗

[@jdevans87]

Well done brother!!

[@olenaerhardt7725]

~@1:20 on the replacing of the compressor: Someone wrote me on Amazon question, that when he put a new compressor he removed all the oil (which was there from the factory) from it, cleaned it w/Mineral Spirits, then added PAG oil. I think it makes sense, since we don't know what oil was added (and how much as a matter of fact), PAG comes in 3 variants: 46, 100, 150, which you can't mix. Now after you wash the Evaporator (really well, since you don't know what oil was there), do you need to add the same amount of new oil to that Evaporator, like you would add to a new one? Or a little bit less? Direction of the flow, is it from High to Low, or in reverse?. Thank you for your film again.

[@ronsimone5558]

Excellent content which was very helpful. Thank You

[@amberbrown9997]

Excellent video/tutorial. Thank you.

[@davida871]

Great video. Im AC certified and explanations were spot on . 🎉

[@songsfromthelord888]

Thanks so much for this helpful video😊 Remember that God loves you 🙂

[@LukeLovesRose]

You're cool for admitting that screwed up, taking responsibility on yourself

[@Trckstr971]

Idk if you’re still around on this vid since it’s over a year old but I have a question. If the compressor comes pre charged, do it still have to add pag oil to it? And if I don’t, would I just add the entire amount needed to the drier/evaporator?

[@yellowjacket548]

excellent video! Thanks a bunch!

[@citizentex5720]

Extremely informative

[@Sconzanator]

How do you add the oil to the evap when you have an expansion valve?

[@darrellmoore4520]

Thanks Bud, Good tutorial.

[@thebenz6756]

For years I've had great success just going to car salvage lot. Finding similar looking parts and putting them on without flushing. One man's junk is another man's treasure

[@natester1064]

You made it a very good video and a very good description.

[@dueljet]

Pulling a vacuum not only removes moisture but removes any other non-condensables that may be in there. You can compress air, you cannot condense it. AC works on the principle of something (like refrigerant) changing state. The latent heat of evaporation and condensation is a wonderful thing.

[@rohitbhatnagar7599]

Does vacuum the oil out of system also?

[@dueljet]

@@rohitbhatnagar7599 not typically. The oil tends to move around in a vaporus state propelled by refrigerant. Pulling a vacuum occurs at a very slow rate and thus the oil is left behind.

[@robertjospeh1097]

Excellent video

[@adrianblake8694]

Great video. Simple & informative. My only question is 'why did you not bleed air out of yellow line before opening valves to charge system? Isn't that counterproductive to pulling vacuum in the 1st place?

[@RepairGeek]

My manifold gauge set has a Schrader valve in the line where it attaches to the can/vacuum pump. When I disconnect the vacuum pump the vacuum is held in the line.

[@duaneulman9915]

Thank you very helpful

[@eirannehooie5951]

Best vodeo ever! Plus I have an 04 Mustang that I'm fairly certain I did the exact same thing! 🤣 It was my sons car and so many things were wrong with it. He decided to get a new car and I decided I could fix it. So I did. 💁🏼‍♀️ From the start with electrical issues to fuel issues to engine issues to vacuum issues, I fixed. It was insane. I get it running and bam! AC issues. 🥺 In the middle of the Houston summer. I feel like this is a brand new car now and soon will be cold AC! Thank you for this video! ❤️ New sub!

[@DarrelKraemer]

outstanding video

[@khaledq8bloshi306]

I did exactly ur mistake last week! I put too much of PAG oil and now my ac compressor making noise and the pressure in high and low side both of them not stable i think unfortunately my ac compressor will die soon i hope it's will stand at less for this samar i wish saw ur video before what i did! Anyway thank you so much I appreciate pro now i learn more about car ac system.

[@dueljet]

Great video, your timing was perfect. I have been trying to figure out what "sprayer" to buy.

[@JoshuaTrenge]

I did the very same thing…. I replaced my compressor…. It leaked so I had to buy another one. I use pressure and duct temp to charge the system…I could not understand why it wasn’t cooling nearly as well as it should (I now know The pressure was higher than normal due to excess oil in the system…and not enough refrigerant). I’m very lucky I didn’t hurt my compressor… Lesson well learned….

[@johnmiley458]

Very informative

[@armankordi]

i have a 89 civic. when i first got it, all I did was vacuum the a/c, change the orings and clean out the hard lines. about 1000 miles after charging it up, the a/c compressor failed, specifically the clutch. this time around I've got a brand new drier, expansion valve, and since my compressor & evap are both serpentine type i'm going to flush them. hopefully that makes the a/c last a good long time.

[@guillermomariel4772]

Excellent job & video, thanks for share !!!

[@DV82excess]

You would make an excellent instructor at an auto tech school

[@matthewbaxter7502]

The best video I've seen on KZbin for us diy mechanics working on the ac system. Very informative. You got a new subscriber. All the best from England. 😊👍👍

[@saulns7159]

Great video

[@AlfredMudau]

We want to know the price of all flashing solvents and prices of that instrument used drain gas and moisture from air conditioning

[@grapeseed427]

Gotta reccomend this video to my customers from now on, some people think i get the parts money. 😂

[@stephtraveler7378]

excellent guide.

[@DKarl16]

Absolutely perfect how-to video I greatly appreciate it!! I do have one question You mentioned that the Ford compressor already comes with oil in it. Why did you have to add oil to the third compressor that you put in?

[@RepairGeek]

I drained as much as I could so I knew how much was in the system total.

[@c.anderson3444]

Wow very thorough.Please do alot more auto video repairs on anything.

[@Theezmoney]

Great video. I like that light you have under the hood. Where did you find that? Is it electric or rechargeable?

[@RepairGeek]

Milwaukee M12:amzn.to/4b224Pz

[@BRZTrackDays]

Awesome video! Thank you for the knowledge share!

[@olenaerhardt7725]

I flushed the system well (including removed Compressor), let it dry for 3-4 days, and started to put everything back. Before I was adding oil into components. I started from the Evaporator, bcs its tubes were opened for flushing and following drying process. And also you need to attach the Expansion Valve, which will close the tubes. So I measured oil PAG 100 2.25 Oz as recommended for the Evaporator in Shop Manual and started to inject it w/small plastic syringe. The Evaporator took 1.25 Oz, but then the oil started to come out, and I couldn't add anymore. Initially I injected the oil into the higher opening, when it couldn't accept anymore I tried to use the smaller bottom hole, but the oil was coming out again. So if I added only 1.25 oz into Evaporator, can I add a bit more into the Drier (by Manual I should add 1 oz)? I think to add 1.25 oz into the Drier, and a bit more then recommended into the Condenser to compensate the difference. Or it is better to add just in hoses? Thank you for your film again. It is very helpful for those who try to master a bit car AC system.

[@RandySweet-u4s]

great video, thanks for the lesson

[@DirtyNate98]

Great video I really appreciate it.

[@JB-ed9jz]

thanks for the very useful info handsome 😉.

[@JamesMartinez702]

Thank you very much for the helpful video ! , if my ac compressor comes pre filled with oil , should i drain it and add half the amount to that and then the other half evaporator?? I appreciate the advice since my ac just grenaded and i have to replace almost all of it 😢 thanks !

[@thadumway225]

Hell of an intro: Today I'll be showing you how to fix an AC system that I messed up🤣

[@RepairGeek]

Why lie? lmao!

[@doctechno2241]

@@RepairGeek You have no idea how much I respect a person who can admit their own f*ckups, and then shows how they make it right.

[@lahattec]

Nice info. Thanks. I've wondered about the air that is in the open yellow hose when you attach the refrigerant can there. It means that air is going into the system. Is that bad, or at least not the ideal?

[@cariea]

I lost all the Freon due to a hole in the condenser. Can I simply bolt on a new condenser, or do I also need to add oil someplace?

[@asbestoswelder6898]

You’ll need to add a small amount of oil into your new condenser before you install it since each part of the system will hold a small amount of oil. You’ll have to look around online to find out what amount you’ll need. Or get yourself a Haynes/Chilton manual.

[@E85_STI]

I’m going to do this but I’m replacing the condenser and expansion valve. I’m using the can with the compressor. You are correct you cannot flush the condenser as it has very tiny offices that will clog so easily. That’s why I’m changing mine but I’m thinking I should flush with the condenser on because it has a integrated accumulator so it catches all the crap then I will flush the Line set then I will flush with compressed air with a dry filter to reduce moisture. I’m vacuuming for an hour anyway.

[@thewoodcrafterioy4003]

You really need to bleed to AIR out of your yellow hose when you connect up a refrigerant can. Every time you change a can you need to bleed to air from the hose. If you don't do that, you are adding non-condensable air to the system.

[@RepairGeek]

The yellow hose has a Schrader valve at the connection at the end of the hose. When I pulled vacuum on the system I also pulled vacuum on the yellow hose. The only thing that could possibly have air in it would be the can tap that was swapped from one can to another.

[@thewoodcrafterioy4003]

@@RepairGeek Your yellow hose has a Schrader valve on the inlet side? Never heard of that. My yellow hose doesn't have a Schrader in it. Your telling me that your can adapter has a pin in the end that depresses the Schrader? Mine does not have anything that would depress a Schrader.

[@RepairGeek]

@@thewoodcrafterioy4003 amzn.to/3E5J6dK That is my gauge set. It's right in the description. "Red and blue conversion hoses 1/4” F x 1/2” ACME-F, yellow hose with shut-off valve 1/2” ACME-F."

[@thebluelunarmonkey]

@@thewoodcrafterioy4003 The fittings on the hoses are called low loss fittings. Sealed on both ends when not connected. The schrader valves can be removed for more flow, but you'll need to bleed the hoses when connecting them.

[@THERIGGEDONE]

Does the vacuum process also remove oil from the compressor? If so, how does one measure the amount removed?

[@FilterYT]

Thanks man! That was very well done.`

[@hzmusallatt]

Hi thanks for video how much pag 46 oil need to add for condenser? Or can pag oil add after this process?

[@Okie-Tom]

Very good info. Thank you much! I have one question and a little tip as well. First of all, what did you do to screw it up at first? If you said so in the video I missed it. A little tip. While filling up the system with the little cans, they can get very frosty and not want to vaporize and go into the system. I always have an Little bucket with nice warm water to set the can into while charging and it really helps. Tom

[@thisisyourcaptainspeaking2259]

Too much oil by twice. Thus, he flushed to remove the oil. He replaced the dessicant, which would have some of that oil in it.

[@Eric-k2i6t]

Add ref slow it will not frost up.

[@thisisyourcaptainspeaking2259]

@@Eric-k2i6t Nah, charge only liquid into the high side, engine off, into vacuum and weigh the charge. That's why there's a charge weight specified.

[@As-px4gn]

Firstly let me say that this is an amazing video! I've read through a lot of the comments not all of them I'll admit. What is the proper procedure if the compressor comes pre-filled with oil. I will most likely be doing exactly what you are replacing everything except for the evaporator coil so in this case all I would need to do is solve them clean and blow out the evaporator. Do the lines come clean from the manufacturers are there manufacturing oils on them? Should the new parts be cleaned pre-installation? Please and thank you

[@luisvargas4577]

Measure how much oil is in original compressor, then make sure new one has that same amount of oil. Pour out oil from new compressor and add back what is needed (same amount as original)

[@aredd92]

Technically that yellow line on the gauges would have a small amount of ambient air in it after disconnecting it from the vacuum pump. So shouldn't you unthread it a bit and purge it with a little refrigerant.

[@salsuginusrex5196]

Orifice tube systems don't have a receiver/dryer. They have an accumulator. They are not the same thing. Additionally, you want to burp the blue hose at the manifold end after opening the can in order to purge the atmospheric air out of the hose. Do this by a quick twist of the fitting--all you need is a quarter-second pulse.