No power to ac compressor

[FoolhardyIDI]

Well the ac compressor will not turn on. Check power at pigtail and nothing traced the line back to a connector on wheel well and no power there ether. Is there a fuse or relay that im not finding? I found a 30 amp fuse under the dash and that was ok.

 

[BDCarrillo]

Might be the hvac selector switch...

 

[gnathv]

Maybe low pressure cut out switch on accumulator.

 

[FoolhardyIDI]

No leaks in the system. I thought that it might be the low pressure switch too. Hooked up the gauges and everything is good. I will check out the HVAC switch on the back of the controller.

 

[gnathv]

Check for voltage going through the low pressure switch.

 

[FoolhardyIDI]

Well I unplugged the low pressure switch check it, plugged it back in and the compressor started to work. So maybe a dirty or lose connection there.

 

[typ4]

My switch did that and then failed 2 days later. The diaphragm may be sticky, time for a new one.