Car overcharged AC system or undercharged fix

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.

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.

Very useful

So if doesn’t go to red when the car is off it means its undercharged?

You told us how to tell if it was over or underfilled but you dudbt say how to take some out it it was overfilled

Excellent video thank you.

The refrigerant dose not cool like many think it absorbs the heat so whatever the temp is outside with the system off should read the same. When the ac is on the refrigerant absorbs the heat in the cabin and dissipates it out of the condenser at the front of the car.

Dose this apply to home refrigerator too.

I don't think you can tell overcharge or undercharge by doing what you are doing.

it’s 115 it arizona

Not only my a/c OVER charged, but too much ATF in the tranny causing it to surge. I won't be taking my car back to the High Five Auto in Richardson, Texas!

very helpful🤌👍

Thank you!!! You saved me a lot of money!!!

Jeez everybody is thanking you, but I'm a bit confused... you start your video with the gauge already attached and the car already running... It needs to run for a couple of minutes before you turn it off and watch the gauge reading, right? - and I assume it doesn't matter if you have the recycle (the air) button on or not...? More importantly, if the car's static pressure and ambient pressure line up, but the air is still not cold, then what?

❤❤❤❤❤❤ Man thank you so much for your video you save me and my wallet

Just bought a 2010 Nissan Rogue in good condition but the AC blows cool air, not cold air. I'm handy but I've never recharged a system before. I hear it's risky to do yourself but MIDAS charges $200-250 for a typical AC service. Any thoughts?

I have a question hopefully you can help me . I plugged my gauge when my car was off and It showed 70 psi the temperature was 20 Celsius outside. When I turned my car and the AC on it went to zero .Is it normal?. I am just scared if I put some refrigerant the static pressure I going to be too high.

Is this somewhat accurate if my compressor clutch never enables ?

This video just ended a wild goose chase to long of a story but gosh thank you!

My homie you just helped me out so much

Thanks for the info on static pressure testing. I have a 99 Yukon that has very cold rear air and not so cold air in the front. The A/C has always worked great for the 7 years I've owned it. I checked the low side pressure with the engine running and it was cycling between 70 and 35psi. The low side tubing does not get cold either. The car is in good shape and has always been well maintenanced. I will need to do a static test the way you describe here to see if I have lost refrigerant. I also suspect the evaporator may have debris (not likely unless something built a nest in there), or the orofice tube may be clogged but am not sure at the moment. The condenser is clean also. The auto parts store thinks it could be the blendor. I do get hot air when I turn the temp to hot but maybe door doesn't actuate all the way when on cold?
Any ideas appreciated. TIY.

thanks very much

You forgot to mention if the gauge your using is hooked up to the high or low side. Ill need to know this before i try it. Or dont it matter? Thanks

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!

Thank you so much static pressure very important

Okay so if it's to high and not overcharge what do I do never touched my ac and now it's hot and barried in the red and never put a drop of anything any video on how to discharge the pressure?

Be careful , you have to wear glasses while doing this , because if gas get in your eyes will be blind. ..

Hi and thank you for the video i wonder how to get that guage you are using
can i find in amazon

Master, in my sonic the compressor enters all the time but it does not cool because the lines have pure air and I purge it but they fill up with air again, what could it be?

CAn someone tell me why my civic ac stop givingh cold air whe I hirt Temperature of 90's degrees

What make and model of gauge is being used. Mine is different and does not work the same way?

I had no idea. Thank you very much. very educational.

Why does it tell us on the bottle to talk to a service pro if the system is overcharged? WHY? What they are just going to do is squirt out a little of the liquid out in the air and call it a days work. The stuff is toxic and there isn't a good way to "safely" release the r-134 ref out. Can't put that stuff back into the bottle.. no sir. This stuff rips wholes in the ozone and its being reelected by lots of people all the time.

I think your method is wrong completely! if at 18 C, the static pressure is at 71 psi. When Ac starts to work, the working pressure is only 10 psi.

You did a fantastic job with this video well planned well thought out you get right to the point and your video matches what you’re talking about 90% of the people on these websites Babylon and on and on and I just don’t have the patience. This one was perfect. Keep up the good work.!!!

Thank you for the information

I really wish it was that simple. This theory defies gas laws.

Hello, so today I decided to see if my ac system was overcharged or not because my ac blows relatively cold air but no heater. When initially using this technique, the static pressure read at about 120 psi (90F ambient), then I turned on the AC at max to let it run and see low side reading, and the gauge sat right at 30. Then I turned it off and left the gauge there. After about 15 minutes, the static pressure reads at about 85 psi. (Still 90F). Which static reading do I go with? First or second ?

Something is not right...the compressor DID NOT CYCLE YET so those readings are not ideal🤔

If my low line shows that there is 0 PSI and zero freon, would it be safe to disconnect my AC lines form the condenser to replace?

Thank you sir this allowed me to figure out my issue now ac is blowing cold.

Thankyou! It worked really well.

Perfectly explained! Fixed my issue.

Smart. I’ll try this out thank you

My ambient temperature says 94F and the AC gauge says 120psi please is it a good value?

The video is extremely helpful.

Great video help me alot

I have a '99 Expedition 5.4L, at 69 degrees F the psi was 68 with the engine off which seems about normal according to your chart, but the A/C doesn't blow as cold during the summer. What could be the cause please?

What do I do if the high side is too low?