GreenMonkey
Newbie
- Joined
- Nov 10, 2011
- Messages
- 38
- Reaction score
- 46
I recently got the AC charged in my 98 k3500. I drove it home from the shop and everything worked great. Got in it a few days later and the air wouldn’t get cold. The compressor wasn’t engaging. My knowledge is limited on AC issues, but here’s what I tried. First, i tapped on the relay, then swapped in a known good relay from another gmt400. Still not working. I checked the fuse on the side of the dash, and the two in the engine bay fuse panel. They all looked good. Then I bypassed both the low and high pressure switches and it still wouldn’t engage. Next, I tried getting power directly from the battery to the compressor with no luck. Is it possible that I lost all my Freon in 2 days of sitting? I don’t see anywhere that looks like it leaked out (no dye on anything). And is there anything else I can easily check before taking it back to a professional. Thanks in advance.