Car overcharged AC system or undercharged fix

How to find out if your car AC system is overcharged or undercharged. When AC compressor turns ON and OFF, and the low side pressure becomes too high, your system may be under or overcharged. You can measure R134a static pressure, and compare it to the ambient temperature chart. And that will give you an idea if you need to add Freon to your car or release some.

[Your-Self]

Forgot to mention that it's best to let your car cool down to ambient temperature for a more accurate pressure reading.
The chart in the video is for R-134a refrigerant.

[kenlgraham]

If overcharged and you have a empty can or one that you just used to charge the system, put the refrigerant can in a container of ice and water. the refrigerant, when you turn the valve on the pressure will drop in the system as the refrigerant moves back to the can. Shut valve off when pressure starts to rise and give time for coolant in can to cool more. Repeat until AC is either properly charged or if you went to far remove the coolant can from the ice water and warm up then use valve to put refrigerant back in vehicle. Please upvote this if it helps you legally correct the overcharge issue, bonus you get to keep the excess refrigerant with this vehicle in case you need to add it later.

[icompleteit]

We spend $22 on the A/C Pro gauge/connecter and fixed the overcharge. Thank you SO much for this easy to understand video. God Bless!

[donnah.]

Fantastic straight to the point video. I used the static test to find out I was low on refrigerant. I kept adding small amounts of refrigerant at a time until I got it in range. Now my AC is working great, and the clutch does not keep cycling on and off. Thanks for a great video, and keep up the good work.

[devonnewest]

Dude you save me, money and from goin nuts. I followed AC Pro's instructions and gauge precisely and had no idea I over changed it. Then a/c stopped working and engine fan screaming load for some reason. I really could have kicked myself for ever having done this. Thank goodness I came across your vid, you make it so easy to understand and do! I did the release in 3 stages over 3 days, didn't want to do it all at once. Now the a/c runs and sounds normal, normal engine fan sound and a/c is cold. I'm never doing a DIY a/c charge again :)

[susannehorn]

This tutorial is 100%+ accurate . Extremely easy to follow directions ; I had no trouble whatsoever; got the pressure down to the perfect level in minutes. Thank you for posting this informative video.

[jamesfalcone]

THANK YOU SO My compressor was cycling and my air conditioning didn't work. I thought that I needed a new compressor (which I didn't have money for) and thought that we'd have to go this summer with no A/C. I found your videos and apparently, I just overcharged my system. I purged some freon and now I have air conditioning this summer. My wife is so happy!

[JazzyJonas]

Wow thank you so much! It's almost impossible to find any useful information on air conditioning. My car's AC was kind of cold (48-50 degrees while driving, not cold at all at idle) and I checked the static pressure was only 70 psi this morning. I added about 2 oz of refrigerant and it's blowing in the low 40's all the time now!

[johnbullwick]

Finally someone who cuts to the chase. Great job!

[jeffkent-jr]

Your awesome man thank you so much! Over an hour searching EVERYWHERE on the internet and countless videos later..you deserve an award lol

[billearnshaw]

Thank you, the compressor was cycling on and off, put the guage on it, showed about 55 psi, and it was about 85 degrees ambient. Started it up and started adding 10 sec at a time, and shortly the air began to cool, kept adding until 30 psi on the low side and very cold air. And it stopped cycling at about 20 psi.

[terrellwhited]

Just found this video after trying to fill my ac up and gotta say, you saved me a trip to the shop. Noticed after filling to what I thought was the right amount the compressor kept kicking on and off in about 1-2 second cycles which definitely felt wrong. Used your method with the car shut off and ambient temperature at 85 degrees and noticed the pressure was like 118 psi. Yeah, that's an overfill. Whoops. Let the pressure back out according to the chart you showed and boom, back to normal. Thank you!

[dave_in_dayton]

Excellent advice. I was easily able to spot an under-charge condition in my 2005 Toyota 4Runner. I then noticed that the addition of only about 3oz. of R134 produced a 20lb increase in static pressure at 69F, so will try adding another 3oz to see if this gets the equalized pressure up to 70psi, as is suggested by the chart for this ambient temperature. THANK-YOU.

[gabecorrea]

Thank you! ....your article helped me to add R-134a to my vehicle at the time of this hot weather when it was really again..

[dannynguyen]

You just saved my butt lol I over charged it and didn’t know we could drain it without the vacuum was bummed to spend more money on a shop lol thank you !

[UBER]

Thanks! This is very good info, on using static pressure readings to get an idea of proper amount of r134a in a system.👍

[colbraddock]

Thank you so much got in my 2003 Duramax this morning and my static pressure was way off dialed it in without your help I'd be sweating with the windows down again I just subscribe to your Channel thank you again God bless

[TheWolf]

Can’t say thanks enough. This worked like a charm! I had my car evac’d and recharged at the dealer after I replaced my condenser and Hi pressure switch. It would work in the shop, but once you’re out in 80+ degree weather, the compressor would turn on for 5-15 seconds and then turn off and just blow the hottest and most miserable air you’ve experienced. Today was 87, so the perfect temp to try this out at. After hooking a gauge up and seeing that the pressure was at the max end of the red I let it out until it was in the green, and my ac blows ice cold again!

[Luis-]

Very helpful video I didnt realized this gauge could be used and your right didn't want to buy new set of manifold just for a top off. Thank u

[patrickutley]

This works.Watch the whole video to understand what to do.If not then something besides your pressures are the problem.Thanks good info.Now I'm going to check out your other videos.