ayoarod88 Posted May 27, 2021 Share Posted May 27, 2021 I have a 2013 CHU613 and I keep losing my voltage at my compressor making the ac stop working. If I turn off the truck and turn it back on the ac will start working again briefly. I’ve ohmed out the compressor, changed out both pressure switches, swapped expansion valves, ac is fully charged, swapped out relays, changed out the ac diagnosis module and checked all the flappers in the cab. Any other ideas of things I could check would be greatly appreciated. Thanks Quote Link to comment https://www.bigmacktrucks.com/topic/66773-ac-compressor-losing-power/ Share on other sites More sharing options...
Joey Mack Posted May 27, 2021 Share Posted May 27, 2021 the last time i had this issue it was in the compressor clutch. is you clutch hidden and I think the plug has 3 wires in it,,??? Quote Link to comment https://www.bigmacktrucks.com/topic/66773-ac-compressor-losing-power/#findComment-474362 Share on other sites More sharing options...
ayoarod88 Posted May 27, 2021 Author Share Posted May 27, 2021 Yes. The clutch has a cover over it. I removed it to see the clutches. I lose power and the clutch disengages. If I supply twelve volts to the clutch it’ll kick back on 1 Quote Link to comment https://www.bigmacktrucks.com/topic/66773-ac-compressor-losing-power/#findComment-474364 Share on other sites More sharing options...
Joey Mack Posted May 27, 2021 Share Posted May 27, 2021 Is the evap core freezing up and shutting the system down? Do you see a good flow of water draining from the drain tray on to the ground when the A/C/ is on? Quote Link to comment https://www.bigmacktrucks.com/topic/66773-ac-compressor-losing-power/#findComment-474365 Share on other sites More sharing options...
ayoarod88 Posted May 27, 2021 Author Share Posted May 27, 2021 Yes. As a matter of fact it was leaving a good size puddle of water Quote Link to comment https://www.bigmacktrucks.com/topic/66773-ac-compressor-losing-power/#findComment-474368 Share on other sites More sharing options...
Joey Mack Posted May 27, 2021 Share Posted May 27, 2021 does it have an APADS module? and is it flashing a code? Quote Link to comment https://www.bigmacktrucks.com/topic/66773-ac-compressor-losing-power/#findComment-474369 Share on other sites More sharing options...
Joey Mack Posted May 27, 2021 Share Posted May 27, 2021 I had another thought. did you put gauges on it and see the high side pressure? if it spikes passed the High pressure setting, it will shut the compressor off too.. Quote Link to comment https://www.bigmacktrucks.com/topic/66773-ac-compressor-losing-power/#findComment-474371 Share on other sites More sharing options...
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