Ok smarter mechanics i have a 00 gmc yukon. I just did a rebuild of the ac system. It comes on and cools down like a champ. Until I sit still for too long. Then it shuts off and won't come back on until do a good bit of driving, or it sits overnight. I have replaced compressor, orifice, and drier. Condenser coil is clean, charge is good, everything seems to be in order. All of the vents blow good, and all of the diverters work. I've tried jumping high and low pressure switches with no results. Clutch fan is spinning great, motor doesn't come close to overheating.
When I press the ac(snowflake) button the light flashes three times then goes out.
The problem seems to strongly correlate, to times where I'm sitting still, but I guess that could be in my mind.
Any ideas? I'm going to replace the ambient air temp sensor later today.
