Page 1 of 1

AC blowing warm air

Posted: Sat Aug 20, 2022 3:43 pm
by issyfish
I have a 2003 astro, my A/C isn't working, it's blowing warm air and has been for a few years. I recharged it and that didn't help. So I replaced the compressor, and the high pressure switch and it has made no differance. Someone else told me to try the A/C pressure in cycle switch, so I changed that and it still is blowing warm air. I'm not sure what to try next.

Re: AC blowing warm air

Posted: Sat Aug 20, 2022 6:01 pm
by MountainManJoe
Welcome to the forum.

Are the evaporator lines getting cold?
You could just have a stuck air mixture door.

Re: AC blowing warm air

Posted: Thu Aug 25, 2022 7:17 pm
by Bret Schmerker
:-k I've an M11006 with an otherwise fully-functioning climate control system, notwithstanding a breached refrigerant line (thus the pulled compressor fuse) and a compromised fan-speed switch. Is your climate control system holding refrigerant (not the case for me)? If so, check for a blown compressor fuse (10A, in the Power-Distribution Center outboard o' the steering). Notwithstanding the down refrigeration, are all modes (viz., A/C, Bi-Level, Vent, Heat, Mix, Defrost) working? If not, ye may have a breached vacuum line; I upgraded my control line to 3/16" fuel hose on the engine side o' the firewall.