Quote:
Originally Posted by trm0002
Of course they can. That said, the easiest test is to simply measure the temperature of the air coming out of the vents. I read somewhere it should be 45 deg but don't take that as the Gospel truth as I'm sure 110 degree AZ heat is different from 88 degree NY heat. Most likely it's supposed to be able to achieve a temperature drop of "x" degrees from ambient temperature down to as cold as "y" degrees. Someone in the know, please chime in with x and y figures.
If you turn on your a/c in the middle of a 20 degree below zero arctic blizzard would it actually warm your car?
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no, because the compressor will not run at all...they have a low ambient temperature cut off, the fan will run but that's all you will get. GM cars have been that way for many many years.