AC blowing warm air

General Discussion
( Please do not post help questions here )
Post Reply

Topic author
I am merely driving my van
I am merely driving my van
Posts: 1
Joined: Sat Aug 20, 2022 3:33 pm

AC blowing warm air

Post 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.
User avatar

I have my van tatooed on my cheeks
Posts: 2949
Joined: Fri Aug 08, 2008 12:55 pm
Location: The Pacific North Wet
Has thanked: 28 times
Been thanked: 12 times

Re: AC blowing warm air

Post by MountainManJoe »

Welcome to the forum.

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

Bret Schmerker
I get chills without my van.
Posts: 95
Joined: Sun Jul 29, 2018 6:02 pm
Location: Byron, CA, USA
Has thanked: 1 time
Been thanked: 2 times

Re: AC blowing warm air

Post 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.
1997 GMC M11006 (Safari SLE, 2WD, V6-4300/4L60-E/7.625" 3.73:1 open)
Acquired Jul 2018 / In service Sep 2018 - present
Post Reply