The A/C Compressor does not stay engaged on my 2000 Z71, 5.3L, V8. When the compressor is running the A/C is Ice Cold, however it will eventually turn to blowing outside temperature air (which in Alabama in August is not pleasant). If I push the A/C button in the cab to turn the A/C off, wait a few moments and then turn it on again, the air again is ice cold. I've done this while the truck is idle and when I push the A/C button you can hear the compressor clutch engage. This led me to beleive that for some reason it's disengaging when it shouldn't be. A buddy that has a Tahoe suggested the switch on the side of the accumulator (A/C Cycle switch or high pressure cutoff switch?)is a relatively easy and cheap fix that may solve the problem.
Anyone have any experience with this and/or know what the switch is called?

 

its a cycling switch...or low pressure cut-off switch....pretty good bet thats the problem...COULD be a weak compressor clutch

 

Is it possible it could just be on the border line of being too low on R-134A to allow the compressor to stay on?

 

DOUBTFUL IF IT GETS ICE COLD WHEN ITS ON...its most likely the switch..but..as usual..she needs to be checked to know fer shore

 

Thanks, I'll give it a shot!

 

Would lack of refrigerant cause the compressor to NOT engage? I had similiar problem except no AC engagement at all. Replaced the AC cycling switch still nothing. But i can run a jumper directly from the battery to the AC compressor and it does engage.

 

Did replacing the AC cycling switch solve the problem?