How to Pull a Vacuum and Recharge Your AC System - ULTIMATE GUIDE - HVAC

[@TutorialGenius]

Like and subscribe for more! All parts, tools and more information in the video description. If this video helped you, please support the channel by clicking "Thanks"! We also have memberships to our channel with great perks! kzbin.info/door/0HkS2-1Tk1ULQJj3uGbjdwjoin Thanks for watching!

[@Creator_Nater]

Very well done

[@richardgray8939]

Wow and you're supposed to be some kind of a mechanic I'll tell you you're not you're an idiot for 1 you do not Teflon tape Flair or compression fittings ever ever ever only time of use teflon tape is on a tapered pipe fitting that makes you a real dummy I'll finish watching your video but you get a big thumbs down for being a dummy basic Plumbing

[@juvillace22]

Thanks for the video and specially for the clarification about pump oil and AC oil just bought a pump and came with that oil I really thought using that oil for Ac

[@vinjens1791]

Will that gauge and vacuum pump work my heatpump in my home as well?

[@thetorturechamber]

Hello friend Im hoping you can help me 🙏🙏 I watched you video and followed precisly your methods but when I jumped the clutch and tried to get the refrigerant in it would not take in the refrigerant 😪 I worked one it allay even re vacuumed the system and redid the entire proceed but it would not suck in the refrigerant.. what am i not doing rite?? any help or guidance is very much appreciated 🙏🙏

[@bill6946]

Hello my name is Bill from Medford Southern Oregon this guy is absolute telling you the truth this the way you do it 12 years I'm in AC so I know he's right yeah yeah kudos kudos brother

[@TutorialGenius]

Thanks buddy!

[@NukaPlays22]

Welcome Bill

[@JetFire9]

A lot of mistakes in this video. Bill, you’ve been doing it wrong for 12 years. Oh well.

[@iansteward4708]

Like what?

[@leonardtrump9155]

@@iansteward4708 that’s your first mistake😂 any other questions

[@RollerCam]

Flare fittings don't need teflon tape. The seal is only between the two, angled mating surfaces.

[@TutorialGenius]

FLARE fittings, yes correct, but, not ALL gauges have flare fittings ;)

[@RollerCam]

I've never seen any that DIDN'T. Yours obviously do.

[@TutorialGenius]

That's interesting! Spend some time in the field and you will!@@RollerCam

[@RollerCam]

11 years as a factory mechanic at a So Cal dealership wasn't enough to attain your level of knowledge, it appears. 😐

[@martinwinlow]

Yep, and the video poster clearly keeps tapping the threaded portion of the fitting indicating that it's the threads that need taping and this is patent nonsense (just like all the idiot plumbers out there who insist on clarting compression fitting threads with tape, too! Not to mention equally gormless people who tighten o-ring-sealed joints with a bloody spanner! Utterly pointless...)

[@JohnnyDS6557]

After watching a number of videos, you are the first to tell me that when I am drawing a vacuum, I do not draw off the PAG oil. THANK YOU. I evacuated my system (during the removal of the secondary rear HVAC unit) and wanted to know if I needed to put more oil in the front system during recharging. I bought the vacuum pump as well as the gauges and pulled the vacuum to test for system integrity and extended the vacuum time to ensure complete removal of water (since the system had been opened when ancillary pipes were removed).

[@TutorialGenius]

I'm glad it was useful! :) Yeah, many of the videos on here kinda suck, or at least, don't go into too much detail, so that's why I decided to make my own! Glad you liked it!

[@311superfly]

I disagree. Oil CAN be drawn out of system .Professional A/C machines have oil reservoir than need to to be drained. Where does that oil come from? Your system I suppose.

[@richchiarito9794]

This guy should have 1 million subscribers already. Your video was so descriptive I feel confident pulling a vacuum and recharging my air conditioning system. Thank you for taking the time to list the items in the video with links. You are the man!

[@TutorialGenius]

You're welcome! Thanks for watching and the kind comments! I really appreciate it a lot

[@mickm5097]

Thanks man. I think a lot of us appreciate the amount of detail you included in your explanation of how to vacuum and recharge an auto ac system.

[@TutorialGenius]

You're welcome! Thank you for the kind comments 🙂

[@moonbongyang6460]

I've been watching videos on this topic ALL DAY while I've been working on this vehicle and this video is BY FAR, the clearest, most informative and concise one. Many thanks Cheers

[@TutorialGenius]

You're welcome! :) I noticed a similar thing so I figured I should make a thorough video explaining it all better! Glad it helped!

[@Fordgroup00]

@@TutorialGenius Thank you for your time, much appreciated!! 👍👍

[@DTUFINOPhotography]

I agree... extremely infrmative and clear!

[@kennethkessler6427]

Nice work! And you included the critical step of purging the air from the service line (yellow hose) and how to deal with the compressor that won't kick on due to the low pressure switch. Bravo.

[@TutorialGenius]

Glad it helped! Thanks for watching! :)

[@billjoseph8512]

would air still be in the low side line of gauge still after purging service line or is that small amount expected. also love the content and Russel brand sound.

[@U2BER2012]

Funny you say that; I was thinking the same thing about purging the lines!

[@subzerokstyles]

The low side line is under a vacuum with the rest of the ac system; there should not be any air/moisture in the low side line while purging the service line.

[@michaelpesqueira6911]

This is THE #1 BEST car A.C. video [out of 80 AC videos that I have viewed]. I have charged my cars' refrigerant about 20 times, but was reluctant to try to use a vacuum device until viewing your video. Your video is BY FAR, the clearest, most informative and concise one that I have seen. I greatly appreciate that your descriptions were simple enough for novice users. Thank you for all your time to create the video [preparation, filming and fabulous editing].

[@TutorialGenius]

That's great! Thank you for the feedback. I definitely gives me motivation to keep going! :) Hope you have a good Christmas holiday this year ☃️

[@gmancusa]

Thank you! Very thorough and direct with no “captain obvious” over narration. I was unsure about doing this myself until I saw this!

[@TutorialGenius]

Thank you for the kind comments! Good luck with your project! I'm sure it'll go smoothy!

[@jacquelinemccully912]

I have to thank you for all of your videos on repairing the AC system on a Saturn Vue. I have a 2006 Saturn Vue, 3.5L V6. Thanks to your videos, I was able to replace the condenser, compressor, dryer and expansion valve and vacuum/recharge my system. My AC is working better than ever! As a side note, I wish I would have found your video about replacing the scroll valve earlier. It would have saved replacing the other components. Thanks SO much again for all of your work and time with your videos. It is GREATLY appreciated out here!

[@TutorialGenius]

You're welcome! I'm glad its working great at least!

[@Earthstein]

Excellent presentation. I'm sure the presenter is on the A/c mechanics hit list. Watch your back.

[@TutorialGenius]

The video was made in response to a $2200 quote. This is already the revenge! 😆💯

[@capeman10]

😁🤣🤔😯

[@Theferg1]

When you get ready to refill your system before you start the car go ahead and purge your valve after you hook your freon to your hose and then go ahead and start to refill your system your system will take the freon without the car running!! If the freon don't want to start coming out get a pan or small bucket and put hot water in it and then set the can of freon down in the hot water and it will immediately start coming out. But you can start to put at least one can in your system before you start your car and that away your compressor will come on when you start your car and that away you don't have to go messing around with relays and fuse and things like that Hope this helps

[@catman5546]

I think you are trying a liquid charge on the high side .

[@nclivin4220]

​@@TutorialGeniusone can before starting is definitely easier

[@TutorialGenius]

One can! True! But what about toucan? @@nclivin4220

[@nclivin4220]

@@TutorialGenius toucan 😂😂😂

[@cjackfly]

​@@TutorialGenius My van is 52oz. but that info is from Google so I don't trust it. What's a good source for info on this subject?

[@bigl0892]

Thank you!! Had to replace my ac compressor and this had everything I needed to vacuum and recharge my system to include trouble shooting potential issues and purging before recharging!! No other video I watched had those little details that are apparently extremely important. Thank you again, good sir!!

[@TutorialGenius]

You're welcome! I'm glad you're back up and running again! 💯❄️

[@JamesMay-bq1qv]

I don’t think this guy did not miss one thing I’m getting ready to do exactly all of that as we speak but I think all videos help a lot of us. I know I get a lot more out of watching then I actually do reading or a diagram. And especially if you have ADHD very helpful

[@TutorialGenius]

Thank you for the kind comments! I like to teach in a way that I would understand, so I guess we are the same type of learner! Good luck with the project! :)

[@groverhardin]

No nonsense factual tutorial. Dude you are a genius!

[@TutorialGenius]

I'm glad it helped! :)

[@RbNetEngr]

Thank you for making this excellent video. I rented a vacuum pump and gauges from AutoZone, just to draw a vacuum and verify that my system has no leaks and can be refilled. But I thought that refilling it would require some additional components. After watching this video and realizing that I have everything I need to recharge the system (except for the R134A), I am going to recharge it myself and save over $200 that the shop will charge to do the work.

[@TutorialGenius]

Glad it helped! :) Let us know how it goes!

[@timmccutcheon4080]

Thank you for taking the time too provide a very educational, meaningful overview of AC.. working on my Honda's, videos like yours help understand and contribute to a successful repair

[@TutorialGenius]

Thanks great to hear! Thank you for your kind comments

[@outkastsk8er20]

Thanks for the refresher course. On a 2017 Toyota Corolla iM, I needed to jump the pins for the radiator fan relay to jump start the ac compressor which is clutchless. In the engine bay fuse box there are no diagrams on the relays, but I needed to jump the two pins closest to the front of the vehicle.

[@olenaerhardt7725]

@10:25 Thank you for showing how to use the Adapter in all the details.

[@TutorialGenius]

You're welcome!! :)

[@TripleTTony]

I've watch 45 videos this weekend and this was my far the best, especially when using the little cans. The only difference was that you were the only one that instructed to open the high side during the vacuum cycle. But you way must be right because its working for everyone. I dont know why you shouldn't ever open the high side but it was said over and over.

[@Gruin]

Only during the Vacuum, High side Closed when Charging freon on low pressure side. The high pressure guage will still read the pressure, when valve is closed.

[@trencher7]

@@Gruindo you mean the high valve is open at the valve stem but closed on The gauge? I assume it would have to be to get pressure reading. I just ordered the kit and the high is only thing not clear to me.

[@boblevey]

Some are mechanics but not everyone is a teacher, you are both!!! I love the fuse jumper cable piece, just in case! Thank you

[@TutorialGenius]

You are so welcome! Thanks for the kind comments! :)

[@williamcharles9480]

What a thorough and concise tutorial! I'm impressed. Very impressed. You didn't miss a thing. I just had to subscribe.

[@TutorialGenius]

Glad it was helpful! Thank you for the kind comments! :)

[@snwdn]

Jumping the compressor fuse helped me so much! Don't think I could have done it otherwise. Thank you!

[@TutorialGenius]

You're welcome! :) Glad to hear!

[@jimjones5644]

You are the man I followed your directions and it worked like a champ hopefully the charge will hold. I put new o-rings in the high and low side compressor ports on the Subaru. Supposedly it's a known failure point. The only comment I have I think that stuff looks like smoke is coming out of the vacuum pump I think that's moisture just getting sucked out of a system. I played around with it for a little while every time I introduced air into the system and then drew a vacuum on it I saw the smoke come out of the vacuum pump.

[@TutorialGenius]

Great, im glad it worked out! The smoke you talk about, I believe I already mentioned this in the video, if its a new vacuum pump, its normal

[@rvpps2rocks]

This should be renamed "ELI5 recharging your AC". Everything makes sense and I don't have to go research what is this or that now, 🙏👍 thanks

[@jessealanis7443]

Amazing tutorial, thank you very much. Followed all your points and got my AC running like new. Again thank you so much.

[@TutorialGenius]

Glad it helped! :)

[@silverstake88]

Dang. I've never seen a better description of charging a/c. Thanks much!! I'd give you two thumbs up, but KZbin only allows one....

[@TutorialGenius]

Thanks! 🔥😊

[@paulmuff9883]

I’ve watched a lot of theses as I’m going to change the condenser as holed , your vide is by far the best I’ve seen, manny thanks 👍

[@TutorialGenius]

Glad it helped! I hope you subscribe to my channel soon! :)

[@OneToGo1]

Hey buddy thank you for that video you absolutely deserve a million dollars very detailed explain everything that makes sense to the commoner and you took your time. And you showed some scenarios. That we could try to troubleshoot. but at the enf of the day. You did a h*** of a job with the video. Thanks man.

[@TutorialGenius]

I'm glad it was useful! Good luck with your project! (I'm assuming you have one to do soon!). :)

[@shaazy]

This video, for want of a better word, is priceless! Thank you to you sir!

[@TutorialGenius]

Glad it was helpful! :)

[@u.s.a.198]

Great tip jumping the compressor... thank you!

[@olivercruztorres291]

The most complete service explained

[@TutorialGenius]

You're welcome! Thanks for watching! :)

[@TolaTrucking]

You're a natural ...one of the best on the topic

[@TutorialGenius]

Thanks for the kind comments! :)

[@ronb8052]

Really a good tutorial.....very detailed and great step by step description. Thank you.

[@TutorialGenius]

You're very welcome!

[@Grrrnthumb]

Wow, great video, thumbs up! One note, at 6:04 you said to use teflon tape on the pump threads, but actually that doesn't help at all, could even make it worse. Any time your threads are on brass piece attached to a hose, and they spin independent of the hose (same as a garden hose) then the washer or o-ring or rubber seal inside the hose does 100% of the sealing. Threads do zero% of the sealing because gas/air/water could just escape out the top where the threads attach to the hose and spin separate from it. The job of the threads is only to pull tight on the seal that is already there, and adding teflon just makes it harder for the threads to do their job.

[@TutorialGenius]

It's to do with the fitting, not the material type. (I.e. brass) IF you have a flare fitting, don't use it. Because the connector won't bottom out, and it CAN leak (Not always) IF you don't, then use it.

[@Grrrnthumb]

​@@TutorialGenius Sorry, I didn't mean it depends on the brass material, only that the brass piece you hold up and show us at about 6:05 spins INDEPENDENTLY of the hose. That means you do have a flare-type fitting or similar with an internal washer that does NOT want teflon tape. It is incorrect to use teflon tape on that exact fitting as you claim. It could only make the seal worse, not better.

[@TutorialGenius]

@@Grrrnthumb Yes, if you have these types of connections, then I cover this in this video: kzbin.info/www/bejne/qH-Xd6CJmd-artk

[@illbebad]

many thanks! First video I have seen that explained why I couldn't get the freon in the system (I didn't know that all the way screwed in AND out meant the can was closed!)

[@TutorialGenius]

You're welcome! ☺

[@joegonzalez7518]

Incredible video, mate! So much attention to detail. No idea why there aren't hoards of subscribers. You wouldn't happen to be from Zimbabwe, originally, yeah?

[@TutorialGenius]

Thanks for the kind comments! Slowly but surely getting momentum here on KZbin. It's a long and painstaking process, but maybe i'll get there in the end :) Never been to Zimbabwe, but I have fancied visiting South Africa; I was going to go this year

[@phoebedad]

Best video on this topic on all of KZbin.

[@TutorialGenius]

Glad it helped! :) Thanks for the kind words!

[@belmintalic7243]

What if it goes to 20 and stays there instead of below 30 when u vacuum the pressure? Great video!!

[@TutorialGenius]

Under normal conditions, meaning the system is properly sealed, and the pump and gauge set are working correctly, vacuum should pull to 30” of vacuum within the first minute and hold while the pump is running. If the system doesn’t pull down to 30” of vacuum at all while the pump is running, there’s a significant leak preventing it from doing so, or there’s a problem with the pump.

[@gandl2123]

Great Video. Thanks for doing this. Helped me much...watched it twice. Done it before but been some years. Nice refresher. :)

[@TutorialGenius]

Glad it helped! :) I hope you subscribe to my channel soon! :)

[@yoyimarti2864]

Well great step by step slow pace video for us 101 rookies lol... So now I know how to charge it back !!!!! I will now look for your extraction video process, hopefully it's this clear also cause it's my first time doing this and im not to confident messing with pressure tanks and machines!!! 😅 Even though I definitely do mecanic work... thakx again

[@TutorialGenius]

Glad it helped! 💥😊

[@GraeSkyeStudio]

Excellent vid and instruction. Thanks so much for taking the time to produce it.

[@TutorialGenius]

My pleasure! I'm glad it was helpful!

[@damianfaherty1230]

A very well explained process. Thank you. It worked perfectly. I also learned a bit about R12a versus R134a using 40% less refrigerant.

[@TutorialGenius]

Glad it helped! :)

[@thinktanium9789]

thank you for explaining why the PAG oil wont be sucked out when you vacuum, that had me confused af on other videos

[@TutorialGenius]

You're welcome!

[@normanhall3897]

very professional. clear vocals, great camera work thanks a lot my man..great job

[@TutorialGenius]

Glad you enjoyed it! Thank you for the kind comments! :)

[@upaiaq]

Thanks for this and your attention to detail,I feel totally confident and am going to give this a go.

[@TutorialGenius]

You can do it! 💪 Keep us updated!

[@easilyconfused-d9g]

one thing to also keep in mind is to check your valves with a little spit hawk tuah. if you see bubbles take a small allen wrench and quickly press on the valve to reset the valve seat. probably one of the most overlooked leaks on ac systems

[@TutorialGenius]

Yup, I believe I already covered this in the video, but I did neglect the hawk tuah part, thank you!

[@joelquaintance9025]

Excellent tutorial. I learned so much, that I actually think that I could do this. (Famous last words.)

[@TutorialGenius]

You can do it!!! 😊💯💯

[@-mejor-que-nostradamus-6152]

I Did A/ Few A/C In Cars, I Never Used A Vacuum, I Replaced Lines, Replaced Compressors, Replaced Condensers And Evaporator Without Doing A Vacuums And Worked Good Always. Amén.

[@ballzzinyourmouth8]

You did a few.

[@glenntagaylo2339]

You don't need to bypass the AC relay to jumpstart your compressor. The pressure switch on the high side line prevented the compressor to run because it has both minimum and maximum pressure required in order to run the compressor. Neither too low nor too high on pressure isn't gonna start the compressor. I only saw +/-50psi on your lowside, I say you need to get at least 70psi and then you don't need to bypass or force the compressor to start. Works well. Hope that helps!

[@philipgoetz8681]

@8:16 you left the cap on the vacuum pump exhaust while it was running. Isn't that bad? Also, my vacuum pump is very similar, and the manual says to take the cap off the oil inlet while it runs.

[@wilfredoortiz3150]

Your excellent explanation I like attending school. Good job

[@TutorialGenius]

Thank you! 😃

[@matthewsequoyah2665]

This is great ! ! 😃👍 You’ve taken the mystery out of working on the ac.

[@TutorialGenius]

I'm glad the video was useful! :) Thanks for watching!

[@grisleigh]

Educational... Thank you for taking the time to upload this video👍👍

[@TutorialGenius]

My pleasure! :)

[@U2BER2012]

Loved this tutorial: well explained & you covered all the bases. Thank you!

[@TutorialGenius]

Glad you enjoyed it!

[@wawan-lbg52]

It is clear tutorial... thank you . I have a question... For Honda Accord 2008 - 2012... because the condenser come with the receiver drier assembled into one. How much we need to add the PAG oil.... when we replace the condenser that come with the receiver drier . If you do not know a specific amount, in general how much usually AC technician add it.. thank you.

[@TutorialGenius]

Check the manual, it'll say the amounts of make-up oil of each component. So just add the two together

[@mariobochynski465]

Great and very detailed video - you saved my day!

[@TutorialGenius]

You're welcome!

[@boblevey]

I finally figured it out, some of the fittings had loosened up. I’ll leave this so that others might see it!! Thanks again A new subscriber, very good info. I have done all steps to pull a vacuum and when I open up the dial on the gauges manifold I get no sound change on the pump nor do I get any read like you do get to 30 , I get 0. Any thoughts would be appreciated!!!

[@ferdinandrodriguez7756]

An outstanding video. Thank you!

[@TutorialGenius]

Glad you enjoyed it! :) Thanks for watching!

[@LeeSuavez]

Great video, thanks for sharing

[@TutorialGenius]

Thanks for the visit!

[@Josephbeatty]

Amazingly well done. Perfectly explained. Thank you thank you

[@TutorialGenius]

Glad you enjoyed it! Thanks so much!

[@phantomstratocaster]

great video very smooth and informative

[@josegalvarado9591]

Hello. This is a useful video, thanks. I just have a question: the vacuum pump sucks the oil too, or the oil remains inside the compressor and A/C system? Thank You. Have a great day.

[@TutorialGenius]

It won't suck the oil... I believe I already mentioned this in the video though

[@stevwal50]

Great video and explanation of the procedure.

[@TutorialGenius]

Glad you enjoyed it!

[@AdrianPio-z8c]

I have a doubt, please help me with that. I could see you did vacuum in both lines low and high but when you added the ac refrigerant you only opened the blue valve and my question is: the hight pressure line don't need to be filled with ac refrigerant? Or only the low pressure line has to be filled with ac refrigerant? Appreciate you can helo to resolve my doubt. Hi from Honduras....

[@dontrice8117]

Very informative and most helpful, thanks!!

[@TutorialGenius]

Glad you enjoyed it!

[@joestocker660]

Definitely appreciate the detail of relays. Excellent altogether. 👍😎 Subbed

[@TutorialGenius]

Thanks!🔥💯💯

[@joestocker660]

@@TutorialGeniusDid my Caravan without incident yesterday. Last night my son brought over his CRV. Even jumping relay, I eventually” noticed the condenser fan fuse was out (clutch required this as well). Once replaced, we were done in 15-20 minutes. I’ve wrenched on cars 40 years, and wouldn’t have thought of forcing clutch. Many thanks again. 👍😎😎

[@TutorialGenius]

@@joestocker660 That's great to hear!! I'm glad you got it done! Thanks for sharing with us all. Amazing!

[@Elcapulove]

Good morning family and thank you very much for the valuable information and for your time. 👍🏼👍🏼

[@Ricky_Mason]

Thanks for the lesson. Well done. It's just what I was looking for.

[@TutorialGenius]

You are welcome! :)

[@CodyBenge-er5dp]

I know I’m late, but is that one of those special Honda/gm Saturns? That looks an awful lot like a j series Honda v6. If so super cool, and also, very informative video!!!!!! I’m a commercial tech for reefer and diesel apu’s. Your video is awesome! I needed to re look up my knowledge on cars as I need to recharge mine and my wife’s. Your video was great.

[@TutorialGenius]

Great it was helpful! :) Yep, it's hard to miss that Honda engine!

[@IlluminatingNight]

I love those Honda engines in that Vue.

[@TutorialGenius]

Same here! 🔥🔥😁

[@PS2502]

Great video. Very concise. Thanks

[@TutorialGenius]

You're welcome! Glad it was helpful! :)

[@mikesantimore6971]

Thanks for the video. You're a good teacher

[@TutorialGenius]

I appreciate that! :)

[@ralligood4155]

best video on how to do this Thank you

[@TutorialGenius]

Glad you liked it! :) Thank you

[@luiscarrasquillo9743]

Great video, about to do this tomorrow. Thank you much

[@TutorialGenius]

Good luck! How did it go?

[@luiscarrasquillo9743]

@@TutorialGenius Man, got it done exactly how you demonstrated and that thing spits out pieces of ice 😂😂😂 Thanks for what you do. God bless you 🙏🏼😎

[@TutorialGenius]

You're welcome! I hope you saved a bunch of $$$!@@luiscarrasquillo9743

[@jimboreaddabible777]

Great video. No nonsense. 👍🏻

[@TutorialGenius]

Thanks! 👍

[@jenniegill97]

Great Video! When measuring the refrigerant weight for correct filling, how do you take account of the amount of refrigerant in the yellow pipe that was used to purge the pipe? Could a pipe load of refrigerant actually be quite a proportion of the specified amount, especially if it is in there as a liquid, rather than a gas, for pipe purging purposes? Or maybe the liquid refrigerant flows back into the canister under gravity before one opens the manifold to start filling, leaving only an insignificant amount of gas in the pipe? Or maybe you tare the canister once the pipe has been purged and then reconnect the canister? Also, did you purge the yellow pipe in between canisters? Thanks for any clarification given.

[@TutorialGenius]

You don't need to worry about the pipe, I think you're over-thinking it. It's almost negligible. The psi readings will tell you the pressures in your system, so go off those. Don't add x and y and hope its okay. If you add the 'correct' amount but it's slightly low on the readings, then add some more. Yes, you should always do this: RE: "Also, did you purge the yellow pipe in between canisters?"

[@olenaerhardt7725]

@11:09 if you see that there is a leak in the system (which is empty, no freon in it, as described in this film), can you add shop air into it to find that leak (by spraying soapy water on connections of AC system e.g.)? I've read or heard somewhere (I think in one of YT films on the subject), that you can not add shop air into the AC system, since it will be contaminated, but I don't see why as we can remove that air w/pump, when creating vacuum. Thank you for this so informative and detailed film. Update: I found the leak, it was on the Compressor. I pressurized air like to 90 psi and started to try to look under the compressor, and here on the side felt some very light breeze on my hand, soapy water showed bubbles. It was on one seam of the Compressor.

[@Redtooth75]

you should try and limit how much air is let into the system. Air and moisture is the enemy of air conditioning systems. The oil in the system is hydroscopic and will absorb moisture and get contaminated, pulling a vacuum will not undo that. Moisture will saturate the drier in the system rendering it useless. A system can be pressurized with nitrogen or CO2 for leak testing, a trace refrigerant can also be added to use an electronic refrigerant leak detector. Adding compressed air can also be hazardous. The refrigerant and oil is not usually very flammable or explosive, but when put into a pressurized environment with oxygen it can be.

[@olenaerhardt7725]

@@Redtooth75 Thank you very much for you replay and pointing out on hydroscopic properties of the PAG oil. I thought it is only air which has the water, and deep vacuum takes care of it. Anyway, I pressurized the system that way already, and found a huge leak on Expansion Valve-to-Evaporator connection. It was hissing, and you could hear it w/no additional devices. It was a wrong o-ring, which came w/the Exp. Valve set. I put a thicker o-ring on the bottom tube (3/32"), and the huge leak stopped. But still there is a small leak somewhere. I pressurized again (30-50 psi), spraying w/soapy water - nothing. But the pressure goes down on your eyes, you can see it, slowly, but drops. It was me, who did something wrong and I can't find it. The system was leaking of course, but much much less. Originally it was empty (the car was w/no AC for 10 years, it is our back up car and we didn't worry much). I tried to fix it at Dealer, but after their several attempts it still failed like after 2 weeks. But the system was working for 2 weeks and after I tried it after 10 years pressing the Schrader valve (I wanted to be sure that there is no refrigerant there, though the gauges showed zero) w/a small flat, it gave that 1 second "pshik" sound. I replaced everything besides Evaporator, Compressor and Liquid Line (it is Expansion Valve -to- Drier Line). Liquid Line I couldn't find for that car, Evaporator is to hard to get to, and the Compressor didn't stall the car before, so I decided to try it. So I flushed the Evaporator and Liquid Line well, several times w/99% Isopropyl Alcohol, then w/Flush Fluid, dried for several days. The Compressor I removed flushed and dried in the same way. I added PAG100 oil, put all the new o-rings and washers, torqued to specs (I have Shop Manual for that car). So in the future I can repeat all that flushing, put new oil, and everything, it is not a problem, but I do need to find that small leak somehow. Do you happen know what can be done at this point? Thank you again.

[@NealHartsChannel]

​@@olenaerhardt7725sometimes the most common leaks are the Schrader valves themselves. These can be replaced also and then you may not have a leak anymore if you can't find it anywhere else.

[@olenaerhardt7725]

@@NealHartsChannel Thank you for your concern, I'm sorry I didn't write update on my comment. The Schrader Valves were possible of course, but not very likely in my case, since I replaced all the lives, besides the Liquid Line (Expansion Valve-to-Drier, I couldn't find it anywhere, and it is the most complicated to replace). I found the leak, it was on the Compressor. I pressurized air like to 90 psi and started to try to look under the compressor, and here on the side felt some very light breeze on my hand, soapy water showed bubbles. It was on one seam of the Compressor. Thank you again.

[@chaser2961]

Shop air will contain quite a bit of moisture, spray it on a board and you will see the mist. (Unless you have a oil/water separator on your air line) so directly adding water will be bad for the oil in the system and in newer condensers the veins are so small you will never get that water out. Nitrogen is dry so it will not soak your system in moisture. C02 is acidic and a solvent so it may cause issues with seals. Nitrogen is inert and will not react with anything so preferably use nitrogen

[@brrrt7623]

Outstanding tutorial. Thank you.

[@TutorialGenius]

Glad it was helpful!

[@gregmccarter2176]

Your the third video that is great..i know fully understand the automobile AC system..im no longer afraid to work on my ac...my 99 chevy express, has zero freon..i shall repair my own..and save a bunch of money

[@TutorialGenius]

Amazing! I'm glad it gave you the confidence! Thanks for watching :)

[@copperaudio9664]

Very nice demo - thanks!

[@TutorialGenius]

My pleasure! I hope it was useful!

[@Mrpokbluesky]

You are so GOOD ! Good explaining .. Wow ! just wow

[@TutorialGenius]

Thank you! 😊😊 I hope it was useful!!

[@buddygallagher1193]

Man, thanks for the video I learned something appreciated.

[@TutorialGenius]

Glad to hear it!

[@JUSTINMARTINEZ-e6b]

Thank you for your explanation very cool!!!

[@TutorialGenius]

You're welcome!

[@Seth.Jrking]

I love your videos can you do one that you are placing a ne2 sink

[@TutorialGenius]

Thanks so much! 😊

[@bayoupirate3808]

Excellent Tutorial. Thanks

[@TutorialGenius]

Glad you liked it!

[@CHIBA280CRV]

That was a very well made informative video sir 👍🏼👍🏼👍🏼👍🏼👍🏼thank you.

[@TutorialGenius]

You're welcome!

[@bobbymiller8563]

Great step by step video

[@TutorialGenius]

You're welcome! :)

[@KevintheSimplicity]

Very informative and thank you. When i turned the pump on and opened the high and low Manifold Gauges, I never heard the sound of the pump changing as i opened them. Any idea why? Does that tell me that the system is not pressurized at all? AC has not worked for years and i just replaced ac compressor today.

[@TutorialGenius]

I'm assuming the system was contaminated from the failed compressor? Did you flush the system before fitting the compressor? Otherwise, I guess if the pump holds negative pressure, I Wouldn't worry too much. If it doesn't, then there's a problem which may explain this

[@sk8luv33films]

great video and breakdown 🔥🔥🔥

[@TutorialGenius]

Glad you enjoyed!! :)

[@damianfaherty1230]

Just excellent. You answered so many questions although I still have three. I am about to replace just the condenser on a 2011 Audi A4. 1) How much PAG oil should I add (if any). I was thinking about 1oz 2) The vehicle calls for 19.5oz of R134a but that has now been replaced by R12a. The can indicates 40% equivalent to R134a. I wish to confirm that I would only use 7.4 oz of R12a. 3) I noticed that your pressure gauge seems to have different scales for different refrigerant types. Is the desired pressure different for R12a v R134a Thanks

[@TutorialGenius]

The service manual will say with regards to PAG oil. It depends on the the: make, model, and, if the new part already contains oil for: the part or the entire whole system. Many things to check with that. You need to check the manual AND the manufacturer of the part itself. I covered some of it in the video already, but not it too much detail.

[@damianfaherty1230]

Thanks very much for your speedy reply. I will hunt for the manual. Could you comment on the the other two questions. Much appreciated.

[@fatihgul77]

Thank you for this very detailed information

[@TutorialGenius]

Glad it was helpful! :)

[@AndreasBusser-d2u]

fine video !!!! but i have a question ! how you know how much Pag oil you removed from system if you open high pressure side too when VACCUM the system ???

[@TutorialGenius]

The answer is already in the video!

[@Drbob90]

Does the oil poured into the compressor circulate throughout the system or do you need to put oil in the lines, dryer, condenser, evaporator separately?

[@TutorialGenius]

Yes it will circulate! :)

[@jamesanderson4014]

Looks like a really great job great video.

[@TutorialGenius]

Thanks 👍

[@franklinbaez6259]

good explanation i like it very nice job

[@Lorenzo69]

My brother you are awesome 👌

[@TutorialGenius]

Thanks for the kind comments! :)

[@pinaconorth007]

Fantastic 😮 thank you 😮

[@AshishCE-i3r]

True video Sir

[@TutorialGenius]

Thanks and welcome!