03 Chevy Avalanche 2500. Started the truck yesterday, everything was fine. Took it about 10 minutes away and the A/C stopped working. I messed with it for a while yesterday and made no progress so I brought it into work today.
Here's what I know... If you disconnect the battery, A/C works. If you leave it sit over night. A/C works. It will stop working after about 5-10 minutes, it will not come back on until one of the above happens. System already had dye in it, no visible leaks. We discharged/recharged the system, no change. Its not a relay. Its not the pump. Compressor clutch kicks on/off fine during the time its working.
We are kind of thinking a pressure switch or control unit. Obviously will try pressure switch first. Anyone have any thoughts?