AC question

[VegasMike]

Doesn't it have something to do with the fact that the Hummer runs an engine mounted fan instead of electric fans? Basically what happens is when you slow down or stop, the rate of airflow through the a/c system slows, so it doesn't cool as much.

I notice with mine that when I stop, the system wars up a little, but once I get moving it cools back down.

[pdxrealtor]

It will fluctuate a little due to the mechanical fan, as VM stated.

Grab a temp gun and see how cold, or warm, the air coming out is. I forget what a car A/C is supposed to be but Google can tell you real quick.

[glennf1]

I noticed on mine sometimes it does the same thing and if I turn the temp all the way hot and then all the way cold it will get much colder. I thought the blend door was sticking but it will do it on both sides so maybe it needs to be calibrated or something.

[jsbihn]

I guess what I am really asking is why isnt it as cold as it was before the breakdown?

I mean is there something that could have been done or not done that is causing the AC not to be as cold as it used to be?

[jsbihn]

OK, here is the latest
- Today ... driving into work I noticed the AC cycles.
After driving for a long time, I noticed that the entire time it went from cold to cool and back to cold again...

Basically it will blow ice cold air , and then it will blow cool air.... then cycles again. You can actually feel and notice the temp change

I dont remember it doing that before the compressor broke.
So what do you think is going on ?
I would really appreciate any answers because I want to be able to take it back with knowledge so I dont get the "oh its suppose to do that" response

[pdxrealtor]

If no one chimes in call a couple other a/c shops and compare answers to your questions. That will arm you with the knowledge you need.

I have no idea whats going on. Could it possibly be your temp control is metering the air temps to keep the cabin at the specified temp on the thermostat?

[glennf1]

My compressor cycles too, it IS supposed to do that. Maybe they didn't put enough refrigerant in the system??