How To Recharge an Auto AC System
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- Опубликовано: 16 июл 2024
- In this video I show you how to properly recharge an empty automotive R134a A/C system after servicing it.
I can not stress safety enough when working with refrigerant gloves and safety glasses are a must.
Equipment wise the bare minimum you will need is a manifold gauge set, a motorized vacuum pump, disposable refrigerant cans, and a tapping valve.
If your system has ANY refrigerant in it as indicated by your gauge set you MUST have it evacuated before disassembling the system. Venting refrigerant from the system to the atmosphere is against EPA regulations.
"Welcome To The Show" Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 3.0 License
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Due to factors beyond the control of Bushougoma, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. Bushougoma assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. Bushougoma recommends safe practices when working with the tools or equipment seen or implied in this video. No information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained in this video is the sole responsibility of the user and not Bushougoma. 
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NOTE: I left out purging the extra refrigerant from the high side hose this was INTENTIONAL. As doing it improperly which is VERY easy if you don't follow the procedure exactly will put FULL HIGH SIDE PRESSURE on your charge can or cylinder which can cause cause the one time relief valve to blow venting all of the refrigerant from the can and your system potentially on you.
Refrigerant cans have a slice partially punched out on the bottom of the can and cylinders have a thin metal disc near the top of the cylinder. When their maximum pressure is exceeded they will vent all of the refrigerant they contain. This escaping refrigerant can flash freeze skin and cause serious injury.
Just thought I would thank you for the great video. I replaced the condenser and accumulator in my 2003 Grand Cherokee and so started with an empty system. I purchased an Extreme Power vacuum pump and manifold set on Amazon for 160 bucks and three cans of r134. After a successful vacuum and leak test, the only problem was the compressor not coming on due to low pressure. Some forum searching led me to pulling the AC relay at the fusebox and jumping the 1 and 2 terminals(the two large ones) and the compressor came on. My digital kitchen scale didnt work so well, so at 27 ounce capacity for my system I put in a little over two 12 ounce cans. Now I have super cold AC and a sense of accomplishment. Thanx again!
This is the most complete, accurate, and professional video I have seen on the subject. Well done, and thanks for sharing!
Gary Drury I agree this guy is very accurate
E39M5SPEED I don't agree fully because many things were said for someone who is advance . After he started to use the scale the explanation was fast and not easy to understand
@@troyb6036 - His explanation when started to explain the "Weight, Measurement and Distribution" of the tank to scale was excellent and could not have done a better job of explaining it. I've never done an AC job but have mechanic and crafted many things to know that explanation of the tank. Maybe you need to take a course on "Weight, Measurement and Distribution" that will allow you to grasp things as the purpose of scales quickly.
@Bruce Lee - I think you need to first decipher someone's answer if your going to put it under the mill. He did explain the theory "Right" so maybe you need to do your research because when the system asks for so many pounds that's what you put in. Nothing else was talked about nut that so get your research together cause it seems to flake somewhere else. If you have a problem, Hey showing is everything where talk is "BS".
Can will see this products
Finally, this fellow youtuber, explains the importance of vacuuming out the ac system and why it should be done. What a great thorough video on AC system charging and testing.. Thanks so much...Canada..
Yes, one thing make sure you do NOT turn the manual quick connect ALL THE WAY DOWN.
Watch the gauges as you manually turn them one a a time until they engage the schrader valve, you will notice a small movement on the gauge and then you know the schrader valve is open. I had to replace one of my schrader valve due to turning manual quick connect ALL THE WAY DOWN. GREAT VIDEO!!!
Excellent vid. Way better than ALL the rest of them on this entire youtube website!
This is, without a doubt, one of the most professionally done a/c videos. A lot of videos on a/c leave a lot to be desired, but this one explains it in very easy to understand, and quite professional terms. What a great job!
Hey Bushougoma; your video is excellent. Your comments are also very informative. You show great patience with many comments, and explain things in detail. Nice going...
The most accurate video on the subject. Addresses everything missed more recently by ChrisFix. Thank you very much. Please do a follow up about how to add PAG oil and indicator dye.
The best video I have seen on RUclips on use of the ac manifold set for autos. You put the others to shame. Thanks
Very good video. Very few people understand the importance of pumping down the system though, so it's good you effectively communicated that.
Great video!
I've easily spent 80hrs reading and watching videos to learn as much as I can. This is the best tutorial I've come across. Thank you!
That's a very good summary. I hope you extend this series to review other issues, like estimating how much oil to add, flushing the system, and finding leaks.
Yes, you forgot to mention the lubricating oil necessary for the compressor.
I go to this video as a refresher each time I prepare to do auto a/c work. Very instructional!!! Thank You Sir!!!!!
thank you for taking the time to make this video it's help me fix my a.c. in my suv you did a great job showings how everything works and what not to do. I hope you keep making them
thanks for the details. I am ready to charge my system after I hit a deer and had to replace the condenser and while I had the system open I replaced the accumulator and added a little pag150 oil I bought a harbor freight pump and evacuated it last fall. Now weather is getting warmer. I will check the vacuum and then follow this procedure. thanks for the details.
Great job of explaining. I really appreciate how thorough you are
Thorough, methodical, and well edited (and excellent job of adding important audio comments later). Good steady camera work too.
Top marks!
Thanks for making this very detailed video! It really helped seeing the steps in a real world application.
You my friend would make a very good teacher. Keep up the excellent work.
That was a better video with more proper explanation than even the big famous channels who get over 1 million views. Great narration and clear and detailed explanation of how everything works. I very rarely give anybody a thumbs up on their air-conditioning videos but yours deserves one 👍.
I definitely have to improve my video editing skills I just shoot and go with no editing. I have very unprofessional video shots just learning how to use RUclips and shoot video.
bushougoma, I'm working on a 1998 Pontiac Trans Sport mini van A/C. After installing brand "NEW" A/C compressor(WITH OIL) AND a "NEW" dryer, I used a vacuum pump exactly as you mentioned. I also replace all the o-rings in the system( FYI, this mini van already has NEW hoses). After vacuuming the system for 1+hr, and testing air leak for 10+ hrs, everything was perfect with no leak whatsoever. So, it was time to fill the system just with 3 mall R-134 12 OZ cans.
At first, the 1st can would not even go to the system. After several tries, it finally started to go in using ONLY the LOW side with hi side OFF(as you mentioned). After several min 1st can went empty with A/C clutch finally engaged. So I close the blue hose valve and replaced the can with the 2nd r-134 12 OZ can(with bleeding the system as you mentioned once more). However, for some reason the 2nd can will NOT go in the system at all no matter what, even with A/C compressor clutch engaged and working. NOTHING from the 2nd can is going in and I do not see anything flowing in that small glass above the yellow line. Do you have any suggestions as to what might causing it not to suck in any more(FYI, I ONLY use one 12 OZ can so far, I was told it will take 36 oz's, OR 2 LB of R134 as it shows on the sticker in front of the car). Also FYI, the blue gage shows 35psi and that's it. I'm puzzled. Please help:-) thank you very much in advance.
by far the best video i found on youtube showing how to get the job done, Thanks a lot
Yes is the best video ever on you tube.very informative.
One of the better videos I've seen on this. Thanks for posting!
Hey busho! I love referring to your videos for the cd5 accords. They're so precise and detailed and of course helpful! I've been meaning to ask, were you ever a Honda tech? I ask because my dad was and you know very precise things about these accords. Stuff that the average person wouldn't like all the little quirks the car has. Thanks for your awesome videos!
I am a beginner with an interest to know more about auto AC. I have looked at several videos but this one is the most informative. Thanksssssss. I have subscribed to this channel. Thanks.
Very detailed tutorial on automotive A/C vacuum /charging .Thank you
EXACTLY what I was looking for! Thanks so much!
Thank you! Such a complete and easy to understand video!
Great video! especially the warnings about charging vapor as opposed to liquid! Thanks for mentioning this! locking up the compressor is very possible by turning the can upside down and flowing liquid into the system.
Liquid is non-compressible. Vapor is compressible. The compressor can not handle the pressures built-up by squeezing a liquid. Something is going to bend 🤔 .
THE GREATEST PROFESSIONAL VIDEO OF HOW IT REALLY WORKS
Absolutely fantastic you filled in many of the blanks from others .. GREAT JOB!!!!!!!! Thanks
Very good video. Many have the camera going all over the place, but your video was great as was the explanation.
Without a doubt one of the best youTube instructional videos ever. Period. I've viewed countless DIY and instructional videos and few, if any, even come close.
Excellent illustration and explanation👏👍
Very good video,easy to follow.Please keep posting.
Liked your video ben working on my a/c on my truck for a couple days. I had to order pump. anyway I have watched a lot of videos in the last few days I found yours direct to the point. very cool. the only thing I don't have is the digital scale.
Great video...Big help in my charging my AC. Thanks!
Good point on valve up and valve down on cans. TU..but i have never ever seen or heard of anybody charging with high side open. even if compressor not running.
Very good video. You explained it in very good detail. I just found you and going to look and see if you have a video on a Full recovery on our R 134 A
Excellent video excellent editing. Thank you
Great video, loved your little Smurf hands too.... Thanks!
Way cool!
Thanks for posting the video.
Thumbs up @ 12:10 for how to purge the yellow line. That helped me choose a nice affordable manifold set without the purge valve on the yellow hose.
Thanks for a good video, especially because I wanted to make sure that the guys knew what they were doing when they need to refill my AC..(might be a female watching them..but now I know what to look for and which questions to ask)
Great video. Thanks for all the information.
Nice professional explanation, doing mine tomorrow.
This is good! Looks like you did it correctly.
What agreat work
The most proper vid I have ever seen 👋👏👏
Good job.Thank you for the information....
Very well done THANKS Mate
Thanks for that video it was very helpful and how you explained it thank you
excellent video. very informative. thank you.
Excellent video, clear, concise, and complete.
Thank You.
Yes, and the video is very clear.
Excellent tutorial. Thumbs up!
Excellent video, thank you.
Super vidéo 👍, très très bien expliqué ! Bravo 👏
i like your video i give it 95% thank you very much
Great clear instructions THANKS
Best car AC vid. Thanks.
Good Video. Clear explanation.
Excellent video, Thanks.
WELL DONE THANK YOU, 👍
I was not sure about pre charging a vacuumed down system a little before starting. All the other videos have you start with a vacuum on it. I will follow your process. I am over thinking it... but thanks again for video. I am about to replace the RCV (refrigerant control valve) on my VW A/C compressor. This type of compressor does not have a clutch like most. It always turns but is variable internally. The RCV varies the swash plate and piston travel. These valves can get stuck and not operate properly.
The quality of this video is the best. I learned a lot. I look forward to one that discusses how to correctly and legally discharge a fully charged system using a refrigerant recovery machine say when converting an R-12 unit to R-134a.
I have a question about my Robinair MVAC R-134a charging manifold. The middle of the of the manifold bar has the standard 1/2 inch male acme port for attaching the yellow charging hose. However this manifold is different in that this charging port fitting is actually a T-fitting that has two 1/2 inch acme ports, the second 1/2 inch acme fitting is located just below the sight glass and at a 90 degree angle to the one used to connect the yellow charging hose which is pointing down. This second port is also I/2 inch acme has a black cap and has a shrader valve core installed. This connector is not to be confused with the two blank connectors that are located at the ends of the bar and made for hanging the red and blue hoses to keep them out of the way. What is the purpose of this shrader port? I'm thinking maybe it is designed to be used in conjunction with a vacuum pump and a ball valve to pull air from the manifold and hoses just prior to charging the AC system. Thank you.
Very good and informative video. I would have liked to see the link for your scale. Thanks for the video.
very educative. Thank you regards
Fantastic informative video thanks
Napaka angas naman po niyan lods grabe naman po yan
Great video Bushougoma! Question, Would you do anything different than seen in your fine video if it was for a newly installed variable displacement
type compressor with expansion valve type system? Any thoughts on this?
Excellent video. Clear, Precise and very Helpful. One question has crept up on me related to recharging. PAG46 oil. On my 2001 Caravan, one site says it holds 13 ounces; another 7.4 ounces. The compressor itself says it holds already 5.4 ounces and to add 4 MORE ounces if the vehicle has rear air {which mine does.} That would be 9.4 ounces. I added .8 ounces to the dryer, and 1.5 ounces to the condenser. Assuming the evaporator still holds 20%, what if any oil do I really need to add? Who is right?
what kind of manifold set do you have? whats the exact mastercool model you got? I am browsing on amazon and i only see "manual/standard couplers" - i guess these couplers automatic depress the shreader valve when you connect?
My Honda a/c isn't cold. I see some "dried black carbon looking" stains on the condenser. does it sound like a slow leak freon stain? can you also explain how to properly inject a dye into the system? great video
Thank YOU
Good video thanks!
Good job, done correctly.
Great video~!
verry good video thx for scharing
thank you very much
Love your videos! I do wonder how you would know if the manifold gauge set itself is not leaking rather than the A/C system?
Just curious, but after watching a few these self help vids. Why does no one ever check the deep vacuum 1 micron moisture content especially after an open ac situation ? At least You mentioned a moisture possibility, good job.
hi, hope you are good. i always keep your videos as baseline to come back and check , years after i have doubt. great video, .. i was working on a car today 08 chevy sedan .. i see that low side is around 70 coming back to 60 and high side is 130. compressor kicks and clutch engaged.. i assume it is compressor is bad and not TXV stuck open, is my assumption right. pls advise.
Great video!!!!!!!!!!!!!!Thanks
good job
on segment time 13:49 was the portion say open the two lines ( low & high side ) ? Great video just want to follow if I hear you right . Thanks
Great video, lot of great points that many other fail to mention or show as part of the process. I will be replacing my condenser along with dryer and orfice valve next week. I know I will be needing to add oil to the system but is there any way to know or calculate how much to add, since I'm not doing a compressor swap there's no way for me to flush out all of the oil and start over.
Most manufacturer service manuals will tell you how much oil to add after replacing a specific component they will also specify the type of oil and viscosity.
Follow the manual recommendations for adding oil to the new compressor it usually involves draining the old compressor and measuring the oil removed.
That was a damn good video
Nice Video! If I want to hook up the AC manifold to your car to do some measurements for the pressure, should I purge the blue and read lines from air once I connect them or no need as the air will not get into the system? please clarify thx
Thanks for sharing with all those neat toys u have hehe ;)
What is the best pressure for the gas in home split air conditioner? Thanks
Any recommendations on vacuum pumps. Such as size, cfm or anything like that?
If you don't have a Cale how can you tell if it had enough refrigerant will the low side needle not drop at a certain point ?
hi, i hope you will be doing well. What about estimating compressor oil amount in the system while taking the gas out and putting it back into the system. Thanks
Very good pictures
following this video for a/c compressor replacement on a VW camper van. It has two evaporators so I have two questions. The new compressor when it comes will have some oil in it, I understand I'm supposed to pour it out, measure and pour it back in and then add the balance (total cap 8.1 oz) Sanden SD7V16 1146.
Will I be able to refill the compressor with all 8.1 ounces initially or do I split it and put back what I took out and put the rest in another way. I understand about turning the clutch a few times to cycle it.
The van is a MY 2000, this afternoon I borrowed the same exact pump and gauge set from AZ and ran it on the existing broken system for 60 mins and waited for 90 mins with no loss in vacuum. I don't trust it but I'd rather not open every joint and replace the o-rings like I was planning on doing.
Do you think a vacuum test after the a/c compressor (drier, etc) parts have been replaced is an adequate test for a final charge?
Nice one
is there still air in hi and low line? is there no need to purge all three of air ? and could i pull the leftover r134 out of the lines by turning the tank valve off and continuing letting the compressor pull it ?
Gud work
Great info! Fast and clean. But now that my oil is added and my vacuum is pulled I suddenly realized that at just 45 degrees temperature where I live it's too cold to add my R134 and I don't have a heated garage. Is it safe to drive my car like this and add my coolant when the weather warms up several weeks from now? Can anyone offer a solution or suggestion?
hi please i have quick question i try to hook my ac gauge on my 02 Camry find out my high side gauge is not working but the low side is working, please what do u think can caused the high side which is (R) not working thanks
In this video it's stated if the AC system is left open you must change your dryer. what does left open mean? Is it considered left open if you have lost your refrigerant from a bad leaking Schrader valve and are just looking to recharge the system after replacement of Schrader valve ? Or does it mean after changing out a major part is considered left open? Thanks for the helpful video and sorry for all the questions.