Cmylin Posted February 17, 2018 Share Posted February 17, 2018 Does anyone have a wire diagram for the AC unit for a 2003 CH613? The compressor clutch will only turn on when the defrost mode is selected, take it off of defrost, with the AC button on and it does not work, the system is not low on 134a and the low pressure switch is new, as is the control cluster in the cab.... any ideas? Thanks Quote Link to comment https://www.bigmacktrucks.com/topic/52548-2003-ch613-ac-unit/ Share on other sites More sharing options...
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