Charge a/c
 

I have a 2006 HHR 2.4 L I think my ac has air in the system. I cannot read the ac sticker on the car. Can anyone tell me how much R 134a I am supposed to have?
I am getting ready to vacuum it out.

Only way to get "air" in the system is for all the freon pressure to leak down. You may want to rethink your diagnosis.
Hook up some gauges. If there's any pressure, then "air" hasn't entered the system.

FYI. Charge is .41 kg or .9 lb (per the sticker on my 2010)

Ac
 

Thank you that makes sense. I have been looking all over the place. I am about ready to give up and take it to a pro. I have gotten confused with the symptoms. It does not cool except at idle in the yard with gages hooked up. It doe not cycle on and off. But if I turn it off the clutch will go off and back on when I turn it back on. When static the pressure will bleed down to equal. I may have it over pressure now.

Why don't you post your readings.

Ac
 

I will tomorrow. Thanks.

Why do you think it should cycle on/off? The only thing that would make it cycle is either over or under pressure.

Maybe the clutch is slipping or the belt is slipping?

Ac
 

I don't believe anything is slipping.

Those sound like classic over pressurized issues.

Ac
 

That's what I think also.

Why? There are no high and low pressures shown.
Find out before you overthink the wheel.
K.I.S.S.

His quote stated that the pressure would equalize after turning it off, he did not say what the pressures are. Until he post those pressures...it is all a guess. Since the system only holds .9 pounds, it is very easy to over fill and flood the evap preventing the Freon "flash over" that provides the cold evap.

Seen it many times, all kinds of equipment. like I said, just guessing without actual pressures. :smile:

Ac
 

I will try to get them today.

A system should equalize it's pressures when not in use. But it could be 40/40, 60/60 or more.
Knowing ambient air temperatures and the low and high side pressures when in use can help in the diagnosis.

K.I.S.S. = "Keep It Simple Stupid"

Ac
 

Thank you, I look into it in a few. I did bleed some off yesterday and drove about an hour. It did cool down in the 93 degree temp here in Atlanta. Mostly when stopped in traffix or at a steady speed at about 40, or 65. But it did go warmer but not hot. I will be getting pressures in a while. Although I will be quessing as to how much refrigerate is in the system. I thought it might just be easier to vacuum it out and put 14.4 Oz back into it. (.9 lbs).

Might be if you know what you are doing.
filter, PAG, vacuuming correctly etc.

If you're going to post up the pressures, you need all the stats.
Static pressure-gauges hooked up, nothing running.
Working pressures, high and low with AC operating.
Outside/ambient temperature

FYI. I wouldn't post up anything about "bleeding off" freon into the atmosphere.
The EPA feds may come to see you. :skull1:

This is why:



https://cimg4.ibsrv.net/gimg/www.che...9eeb28bd9f.png

https://cimg7.ibsrv.net/gimg/www.che...d9053698dc.png

Ac
 

No I take to get the system properly discharged. It is easier to say bleed.

Hmm. To have it properly discharged it has to be connected to a recovery machine. Those have gauges so you should have been able to see what the pressure readings were when you bleed some off.

edit. I'm starting to doubt the validity of this story. Since the OP hasn't returned in a week now, we either scared him off or it wasn't what it originally appeared to be.

Or he just found his answers/fix elsewhere