Cycling A/C Compressor
Any air conditioner experts out there? My dash air was operating just fine until a couple of days ago. Here's the deal. I start the rig and turn on the dash air. I can hear the compressor pull the eng...
Forum Discussion
Normally, when a Compressor pulls too many amps or the clutch is shorted, it will blow a fuse, they rarely use a resettable circuit breaker. A resettable will not cycle (reset) that quick. You need to find the Hi pressure switch, usually located at the engine compressor area. There also may be a low pressure switch but based on your first post (40 and then 90 on compressor shut down) that is not a factor. If the 12 volt tstat is bypassed, then the Hi pressure switch is suspect as long as you have at least 100 to 140 psi on the hi side when running. If you do NOT have a hi gauge, and the system is 134a, install just 1 can and see if the compressor stays ON. 134a systems will ALWAYS have bubbles in the sight glass when fully charged. Freon 12 systems you will NOT have bubbles when fully charged. The compressor cycle time is just what you would see from a low charge and the hi pressure switch kicking in and out. Doug
