How To Pull A Vacuum On Your AC System And Recharge Your AC System
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- เผยแพร่เมื่อ 23 พ.ค. 2019
- The AC compressor decides to stop working. The following video gives a summary of the steps I did to pull a vacuum from your system to get rid of any moisture and air from your AC system. *** DONT FORGET TO PURGE AIR OUT OF THE YELLOW LINE* from what i hear, its kind of a big deal 😀
disclaimer please take these videos as informative and for what they are. Just a guy that likes Jeeps and helping people. I may miss things, skip a step you may typically do.. things like that. I’m not factory trained (unfortunately). I definitely appreciate your input in my videos so I can learn something new. It’s all about learning and growing.
**Don’t forget to rotate the refrigerant can as you are filling the system. Rotating the can back and forth between 12 and 3. **
Once that’s done, the system is recharged with R134.
Harbor freight has great AC manifold gauges. Autozone rental program has the vacuum pump - pay a deposit and return the tool. You get your deposit back.
AC manifold gauges
www.harborfreight.com/ac-r134...
Vacuum pump
m.autozone.com/tools-and-equi...
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disclaimer please take these videos as informative and for what they are. Just a guy that likes Jeeps and helping people. I may miss things, skip a step you may typically do.. things like that. I’m not factory trained (unfortunately). I definitely appreciate your input in my videos so I can learn something new. It’s all about learning and growing.
Enjoy! - ยานยนต์และพาหนะ
30 year Master HVACR service tech here, I would like to point out a few things to anyone watching this. First, if you notice the red, yellow, and blue hoses that are screwed onto the manifold gauge set, his hoses are on backwards, the bent metal end goes toward the unit you are working on, these ends have service core depressors which should be removed for Automotive use allowing for free flow and no restrictions, the metal quick connects have manual service core depressors. The straight ends should be placed at your manifold gauge set these ends will not have service core depressors. Also most importantly when you pierce your R134a can and charge your yellow charge hose you need to purge the air out of that hose up by the manifold set, by just cracking the fitting slightly to release the air and a slight amount of freon( R134a) and then tighten it back up. This ensures that you now have nothing but R134a in your charge hose and are not pumping in air with your charge. The most accurate way to get an exact factory charge is to weigh in your freon charge with a digital scale, not all cans have the same amount of freon in them. So if your system says 1.3Lbs of R134a you convert that to ounces which is 20.8 oz. and weight that mount in. I always add a small amount to compensate for what is left in the hose and would charge to 20.9 Oz. But all in all this guy did pretty good, just remember moisture is our enemy, and ambient air has a lot of moisture. PS: the smoke you see coming off of the vacuum pump is moisture boiling off and being taken out of the system and removing it from the descent charge in the receiver/dryer, this is normal. :)
Thanks for taking the time to share your knowledge. It’s all about sharing knowledge and helping each other! Thanks for watching too!!! Cheers!!!!
I have a question- when swapping between cans(my truck takes 36 oz so 3 cans) do I add the can, once empty, close off the low side at the gauges, attach second can, pierce, and bleed line, then open back up low side at gauge to continue filling the system? You didn’t show swapping cans in the video. And I don’t wanna do this wrong.
@@67bradenlee YES that would be the correct way to do it using small cans.
@@tracysellman1562 I just read your post, very nice. So is there a way to see how much existing freon is in a car that just needs to be "topped off"?
@@precisionbay6899 No. A recovery machine can weigh how much was in it but you can't reuse it if there was a leak. Moisture and air will have contaminated the recovered material. There is a sticker under the hood that says how much the system should have. Best way is to vacuum the system to empty then add in the correct weight. You can top off using the cheap low pressure gauge but even a single time can lead to degrading the ac system. Cold today busted tomorrow unless filled precisely with no leaks.
THANKS for posting! I just performed this operation on my car (2004 Mercury Sable). I watched your video at least a dozen times, wrote down the steps so as to have them handy during the procedure.
The equipment & freon set me back about $250 (I bought a 2-stage vacuum pump). My beloved wife passed away right at 5 years ago, I've let a LOT of "upkeep" of the infrastructure in my life just "slide". Decided it's time to get my ass in gear. Your procedure worked like a CHARM! Dropped my car vent output temps from 104 degrees to 41 degrees!!
I am very grateful!!!
Thanks a lot..I appreciate it!! Just trying to help folks and save you guys a little money!!
Excellent job done. Very simple, clear and understandable. Wish there be more people like him who could explain in very simple easy understandable and visually presentable language. Thanks a lot.
Very efficient video. Just the right amount of information. Not too chatty and didn't leave me wondering anything. You the man
Thanks a lot. This was one of my first videos so it’s kinda rough. But the info is good. Just a goofy delivery. Thanks for watching!! Glad I could help!
I agree 💯 getting ready to buy the pump and guages and do a recharge on my magnum.
Good job on this video... thorough, clear & easy to follow w/ no complications. Nicely done, thank you
Thanks a lot..I appreciate it!! Just trying to help folks and save you guys a little money!!
@Rawson Harmon hi from what i saw on line the pump will not suck out the oil only moisture . the oil is too heavy to suck out of the lines only moisture.
Last time i worked on a car a/c system was a 70s r-12 system. thanks for the update.
Thx bro.. hadnt done this in 20 yrs.. recently swapped motors on my ecoboost.. you helped me safely get the ac charged..
One of the easier to follow, step by step videos. Excellent.
Raymond Smith thanks!! It’s a lot of steps so I tried to keep easy and clear. Enjoy!!!
For anyone watching thats planning to do this, this is a good video but there’s a few steps to add.
1. Once you have the can attached to the yellow line and the can is punctured, bleed the yellow line at the manifold to purge the air out. That way you only get refrigerant and not air.
2. Keep the can upside down so the liquid refrigerant gets sucked in.
3. Not so much a step but a tip. If you are recharging your system and didn’t replace a major component like a compressor, condenser( where you pre-oiled before installing), etc., you can pour the oil into the yellow line, then attach the can so it sucks in the oil as well as the refrigerant.
How do you bleed the yellow line when you put oil in there or do you fill it up with oil and this takes the air out? I'm not sure how much oil is needed for my 1960 Oldsmobile.
What kind of oil is used in the AC?
Pag46 is what I got from the guy at Autozone.
How do you bleed the line at the manifold
@@fleadoggreen9062 once he punctures the can and the freon is free to come out, before opening up the low side to start allowing refrigerant into the system, loosen the other end of the yellow line where it connects to the gauges. At first, just air will whistle out but eventually you will see refrigerant come out. Be sure to were gloves for protection as you can get burns on your hands from the refrigerant. Tighten the line and you should be good to go.
I really like this video as you focus on operating the manifold gauges and hoses properly.
3 years late, but great video. Bought the equipment last year before the winter, and now I am ready to try it out, thanks to your video!
Thanks a lot..I appreciate it!! Just trying to help folks and save you guys a little money!!
Very good thank you for the quick explanation and simplicity. I worked on a shop long ago and you did explain it all well and easy
Thanks a lot..I appreciate it!! Just trying to help folks and save you guys a little money!!
Thanks for taking the time to put this together. Very informative and straightforward - easy to duplicate. Excellent job!
Awesome thank you. I always wonder how to do this. Thanks to you I understand. Great learning video
Rob Watkins Thank you for your kind words! Glad it helped you get the job done. Save some money and diy!! Keep up the good work!
You forgot to purge your yellow hose of air and may have introduced air along with moisture into your system. If you think about it, when you remove your yellow hose from the vacuum pump, it is under a vacuum and as you unscrew from the pump, you may have sucked moist air into the hose. That really should be purged out before flowing your refrigerant into the system.
How are you supposed to purge it correctly without getting air back into the house when you hook it up again?
@@axtonclonts2897 Pop the vacuum schrader valve at the gauges to release air in the yellow line. Let up when you see refrigerant come through.
Okay I’ve got a problem. My low side is reading 120-130 and high side is stuck on 0. What all could cause that or what is most likely
@@axtonclonts2897 are you sure you got your high side valve open so thst it will read on the meter
@@axtonclonts2897 You have a restriction/blockage in the system. Most likely in the orifice tube condensor or accumulator
Thanks! I'm not too familiar with A/Cs besides regular freon fill. I never used the vacuum and the manifold and was always a little apprehensive about it. Seeing this mad me realize how easy it was. My AC lost all its pressure and I had to do this to get a good vacuum. I was able to find the leak, it was on the high side valve Thanks!
best explanation on TH-cam 👌 thanks for the details. now I can do it myself.
Thank you for the nice words. I’m glad this video was able to help you and save you a few bucks.
I wish I can rank this higher. You explain the process very well and to the point. The free Autozone vacuum rental is priceless. Common DIYers dont have these specialized tools. The vacuumn pressure hold to detect leak detectio
Thanks a lot..I appreciate it!! Just trying to help folks and save you guys a little money!!
Good job. To the point, informative, clear, and easy to follow.
Thanks a Million ..I am confident I will be able to get mine done after watching your video
That’s awesome!!! I hope it all works out for you. Glad you found this info helpful!!!! Keep me posted.
Great video. Easy to understand.. no rocket science, just make it work!
Thank you. Glad the video was useful to you.
Good demonstration. Will be a good reference for those new to dual gauges.
Thanks a lot..I appreciate it!! Just trying to help folks and save you guys a little money!!
Good presentation, enjoyed watching. Everything is spot on except that while charging the system, the recharge (yellow) hose was not purged of the trapped air. The manifold connector for the yellow hose had to be loosened a bit until you could see freon oozing out.
Thank you for taking the time to teach us! Awesome attention to detail 👏👌🙌
Excellent good job. Very simple, clear and understandable and good view close up.
Excellent video! Made my AC system servicing a lot easier
Thank you so much for your video. I was able to replace my compressor, accumulator, a busted line, evacuate and recharge the system. No I have have cold air flowing again.
Great video. So easy to follow and very informative. Just one thing; You should purge the refrigerant line from the charge can to the manifold to remove the air. Otherwise, it is pushed into the system.
Appreciate the video. Our local shops are so backed up they can't get anyone in for a couple of weeks. Going to DIY.
Glad to help. Good luck!!!
The red or high side isn’t connected to the yellow hose at all. It’s only used for diagnostic purposes. It serves zero purposes for recharging. Only thing you could possibly get from hooking it up to recharge your system is maybe make the valve start leaking. So if your just recharging your system do not hook up the red hose.
Great video. Explained what valves to open and close very well.
Thanks a lot..I appreciate it!! Just trying to help folks and save you guys a little money!!
Awesome video. Thanks for the information!!! Easy to follow!!!
Thanks a lot..I appreciate it!! Just trying to help folks and save you guys a little money!!
I'm doing an ac condenser on my 2002 grand cherokee inline 6 so this was very very helpful
Thanks a lot..I appreciate it!! Just trying to help folks and save you guys a little money!!
"Oh that's cold...oh ho ho ho hooooooyea." 😆 great video, thanks for the help!
Good of explaining step by step on how to pull a vacuum on the ac system
Thanks. I’m not an expert but after some good research, this is how I accomplished the task. Glad to help you!
Best video by far showed everything there was to know👌🏾
Thank you. Glad you found it helpful.
One thing I loved about my old Dodge Neon was that it had the exact same ac system as the Caravan so it took 2.8lbs of freon, I always rounded it up to 3lbs even and it would get so cold little pieces of ice would fly out of the vents and after a few minutes I would to turn it down to medium and this is on a 112 degree day in Tucson, aside from being a quick little car it wasn't that great but man the AC is still the gold standard for me and I have literally driven every car made at the auto auction.
Nothing beats ice cold AC on a hot day!!!!!
Outstanding tutorial! Thank you!
Really liked this video. Very simple & to the point on most parts. The only thing is that the way I have learned it, making sense, was to purge the yellow line with opening the yellow valve core there to let the air out WHILE ALSO turning the can UPSIDE DOWN while shaking it at the same time so the freon can be ready to come out 1st & the whole can empties completely. Then stop pressing valve once you start seeing freon sprinkling out the valve. Noticing that the can will start getting cold while you're shaking it & it's draining through. But for sure this video was great man. I've used it several times to go back & remember what to do next at certain points of the process. Thank you 👍
Awesome video . Nice voice easy to understand. Well done thank you .
Thanks Joe!!!..when I win power ball or my roadside service business doing well you WILL be invited on expense trip with me and all TH-cam mechanics and techs that have taught me something!! Excellent video and instructions
Hi Joe, I'm doing this for the first time, I want to learn to service my cars on my own. Do I have to evacuate the system if I'm replacing a compressor? Or just replace the compressor and pull a vacuum later? Also, how do I know if I need to put oil in the system so the compressor is properly lubricated? Thank you for this video by the way!
Awesome video. Appreciate your explanation of this process. I've got a 1992 camry LE 4-cylinder not sure what type refrigerant it'll take.
JOE, Now you forgot to purge the line before adding the refrigerant to the system to purge the line just listen the yellow hose by the manifold gauge just crack it open,i ok till a little bit of refrigerant comes out, once a must or some such is very little comes out your good tighten the yellow line and your good to go yes that will keep any moisture out of the system THANK YOU KEN VALENCIA
Thanks for the details. I’ll try that next time. I have to charge another ac system. I’ll try it.
Nice video. Thanks
1:39 i love harbour freight its nice quality and acurate.
Man you rock! I needed to refill my car after doing a bunch of work on it. I was about to buy one of these pumps and had no clue that Autozone rents them out. Thanks for the video! I'm going to rent one early tomorrow.
Glad I could help. It's a lot of little steps but I'm glad this was helpful to you!!!!
They also have gauges and a flush canister if you have compressor that grenaded.
ORielly does it too. No rental fee, just deposit when you take it and you get it back upon return. They also have gauges and a flush canister if you need.
Finally someone who explains things step by step !!!
Tank you well explain. God bless
Very good video! Thank you!
Glad you liked it! Thank you!
This is the best video i have seen explaining how to safely and properly use a vacuum pump and fill using gauges. This should be the only video allowed on TH-cam for this service.
Thanks a lot..I appreciate it!! Just trying to help folks and save you guys a little money!!
Excellent video and good explanation 👍👍👍👍👍👍
Awesome!!!! Thank you!!!!!
thank you for great video you explain step by step now i know how to work on car ac now . i watch the another people video i do not understand until i watch you video. love the video
Thank you for the kind words. Glad I could help you
Nice One !!! Thank you very much. :)
What does it mean when you start pulling a vacuum and it start at +10psi. I replaced my condenser/pump/drier so I would expect to start out a 0. After 30 minutes its now sitting at 0. High and low sides are open as well as the yellow going to the new robinair vacuum pump. Are my snapon (old) guages reading wrong? Is there another condition that would cause this?
hi after looking at your video i am going to follow your steps I replaced the ac line the high side and now have to put a vacum to it. I did not add peg oil since i did that one year ago into the condenser hope my repair line is done right and no leaks . I was going to take it to the shop they want 400. to do the vacuum on it and recharge the line. i order the gauges AND Pump
Best video I have seen yet thank you.
Thank you. It’s not my best work for sure but the AC on this a Jeep was ice cold. 🥶
I bought the manifold gauge from hf and all the refrigerant and adapter from az. You can get it from O'Reilly also. That must be a special vacuum pump because it looks and sounds just like a tire inflator 😆
If you replace the condenser and all refrigerant escaped (through pressure- bad I know), do you still need oil? If so, how much? I know it varies from car to car and compressor to compressor, but if the system had a violent leak and the entire condenser was replaced (only the condenser), how do you gauge how much PAG oil to put back in? The full amount?
Outstanding job
Thank you. I’m glad this helped you!!! Cheers.
Thank you!!
Good job, the only thing wrong with this , is you did NOT bleed the yellow line BEFORE you put R134a in the system. That means that after you vacuumed it. the yellow hose is full of air. It went right straight into the system BEFORE the R134a went in . It now has air in the system.
Yeah..I get that a lot..But it fortunately didn't effect things too much..now long term..maybe. But for the time I had it, no issues..
Thanks for the great video.
Jeff Stone thank you very much!! Glad I could help!!
Helo. Thanks for explanation. One question: Is the vacuum same as one we use to pump tyres?
Excellent video
If my car required 24oz of refrigerant and 3oz pag oil. Would that be 27oz total or do i only put 21oz of refrigerant and 3oz oil. Also, I have changed the condesor. By changing the condendor, did i lose all of the oil in the compressor? Do i need to add pag oil after changing the condensor?
Thank you!
Great video! Thank you
Glad you liked it!
great video! Thanks!
D GOldman thank you!!! Much appreciated
great video
Do u have to draw a vacuum if ur just topping off like those 1 step recharge cans w/gauge they sell at auto stores?
Hey, great presentation, your easy to watch, and listen to.
I have watched alot of these videos, I have some experience with home HVAC.
#1 I agree w/ a previous comment, purge yellow hose with refrigerant before you send to system by cracking hose at gauge before opening low side.
#2 mechanics on this subject have said oil 9n compressor is "shipping oil", the right stuff, but almost a flush for any contaminants from factory, it's a 15 min job, so I hope it's worth it, I did it, you have to turn clutch by hand to get all oil out....if anything you know the compressor is fully lubed when you fire it up.
Not criticism, just alternative opinions I've seen, and sharing.
Like I said awesome presentation 5 star in info
Thank you
Exactly. Always check oil level. The "pre-oiled" compressor I just received yesterday only had 1.5 ounces of oil in it.
@@sweeptheleg6852 Very good point....Thanks for the contribution...
Thanks a lot..I appreciate it!! Just trying to help folks and save you guys a little money!!
Good job
Great video. Good job outta you!!!
Thanks. I try. Just want to help people and save a little money.
Great video, just used this to plan recharging after replacing 2014 Silverado notorious condenser. Not quite sure how to add the PAG oil though.
Thanks a lot..I appreciate it!! Just trying to help folks and save you guys a little money!!
Thanks for video easy to under stand. 1 thing I did learn is before you introduce the freon to the system hit that Schrader valve to fill the yellow hose with freon cause there is some air in line and you want no air at all
Be aware to flush the trapped air (with moisture) in the 3 hoses (yellow, blue & red) before charging the system.
Yeah..I did miss that step...thanks for watching..Hope it was helpful to you.
How do I know how much pag oil is removed when vacuuming?
Very good video buddy excelente job
Thanks a lot..I appreciate it!! Just trying to help folks and save you guys a little money!!
i follow your sets and got my ac working . was nice and cold till later after letting it sit for 3 hrs. my ac condenser got a leak was not leaking hold vacuum .... i replaced the ac condenser 4 years ago and now it got a leak. i have two of my Nissan trucks d21 the other one got a leak in the same spot. I am thinking its poor cheap design. so now i have to look for another one for both of my trucks I had already order one for the first truck, but it can bent . but when i got my ac working again it was nice and cold. thank you for your steps. not hard at all ... now i will have to do this repair cause of he leak , I have one question can pressure make a pin hole on the condenser.
Hello friend. Great vid. I just wanna know, after the system is pressured, what is the process to disconnect everything. The low pressure was still opened and the can was connected. Please and thank you
So, after replacing the compressor with a remanufactured, vacuum checked the system, I didn’t read everything I should have here and I believe I did everything right… up to the point of NOT BLEEDING my lines before opening the valve on the 134a and now my gauges show 40 on low side gauge and 200 on high side gauge and the system is not blowing cold air!
Could have used that information in the video… critical piece of information… so I guess it’s back to the total evacuation of the system and start the purchase and process all over again. Any suggestions on being able to avoid starting all over?
Like the explanation and the visual but aren’t you supposed to have everything on full blast like max cold air, max AC, max fan and recirculating on? Because you didn’t have the recirculating in nor the fan till after Freon was being added and how do you know when to add the second can?
Thank you.
Very helpful
So I decide to do a diy and never contained the Freon and we’ll I had to replace the compressor and when I took off the ports bolt off, and the Freon went everywhere 😢. Can I just install the new one and connect it and turn it on like normal?
Great video dude
Thank you. I’m glad it helped you!
Coincidence or glitch in the matrix? 211k and Memorial Day weekend watching your video to fix my ac
haha..It's definitely the matrix..or SkyNet...
Hi i f i have new problem now, it took almost 2 can but low pressure reading didnt change much while high pressure side reading went from 200-350psi. I stopped and unplugged everything then i noticed low pressure cord end attached to coupler its inner sleeve is ripped, can it cause my reading to be the same? what could be the problem?
Did you turn the can upside down and put the freon in as a liquid?
My question is once you turn the manifold off dosent it close the system there for how do you really know if its holding a vacuum with the blue knob turned off ? May be a dumb question but im willing to learn i get everything else on how to do it i pull a Vacuum turn the knob off but how does the gauge still read with the knob off ?
TH-cam certified 😂😂😂!!! Good video! 👍
Haha. That’s me for sure!
😆😆
How do you know the r134a can is out? My vehicle requests 3.5lbs w/ rear AC.
Thanks good onfo
So to disconnect the hoses from the ac lines, close the valves Ac running?
when switching freon cans, do you close any manifold, service valves?
Just the valve at the can will do.
My cars AC has a special self-depressurizing feature...when the compressor blows up, the system automatically depressurizes! No hassle - no fuss! 😂 😫
Mines has an engine auto stop feature. Cuts on, goes boom, engine dies.😂
Nice
My first car (back in the mid-1970's) was WAY ahead of it's time. These modern cars that shut the engine off at stoplights? Mine had it back then! However, I had to do the "restart" personally!
@@jasonrodgers9063 I can relate!! I remember cranking my engine for like 2 minutes just to get it to start - especially when it was freezing out! I used to stick an ice scraper in the carburetor choke plate to hold it open. That worked sometimes. The ultimate fix was to shoot a blast of starter fluid down the carb - then run around the giant boat and hit the ignition before it dissipates! Hahahaha! Honestly, the troubles I had with my cars led me to a career of turning wrenches!
🤣🤣🤣🤣 heck ya best way to evac just keep running it til it's about to lock up
what you did with the freon on the pump the old freon?
Literally cutting the lawn as suggested while waiting on the vacuum.
Thank you 😊