A/C: Compressor running fine but no cold air - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 08-04-2005, 01:45 PM   #1
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Default A/C: Compressor running fine but no cold air

Help! In the heat of August, my A/C has failed me. What'* happening is the air coming through the A/C vents is not at all cool, even though the compressor is working fine (line from the compressor and heading into the firewall is ice-cold and collects condensation). Any Ideas?
I recently replaced the actuator motor that switches the air supply from A/C to heat, because previous to this I had a situation where heat was constantly entering the cabin, regardless of a/c setting. I don't think this is the identical problem, though, because now the air coming out is not hot, but just not cold either, as if the compressor wasn't running.
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Corey
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Old 08-04-2005, 01:57 PM   #2
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Check the air mix door. It'* possible you are cooling then heating the air.
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Old 08-04-2005, 05:24 PM   #3
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how could I go about doing that? Is the air mix door the same as the door whose motor I just had replaced?
Another detail: It supplies hot air just fine.when asked.
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Corey
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Old 08-04-2005, 10:02 PM   #4
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I would say you're low on freon. The system can be low enough to not make cold air while still running the compressor and chilling the lines some. I found this out this summer.

What year is your car, and do you have electronic climate control?
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Old 08-05-2005, 02:47 AM   #5
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Yes, a low freon charge can cause this yet the lines will still get cold. Depending on the year you may have a temp door out of calibration. Recalibrating is the easiest thing to try, but you need to have it done by a GM dealer. It depends on the year of the car though as to wether or not this is applicable..
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Old 08-05-2005, 11:45 AM   #6
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Well I have a freon gauge and the pressure checks out okay. I'm pretty sure it'* not the freon. This issue about the temperature door calibration: any ideas about how I could verify something like that before I take it into the dealer and kiss $200-$300 dollars goodbye?
My car, by the way, is a 96 and it has electronic a/c control.
Thanks to you all for you ideas.
-Corey
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