David Bidelspach Posted February 1, 2021 Share Posted February 1, 2021 We are working on a 2012 Mack GU713 Granite. The A/C Compressor does not start with the normal switch. We checked the Switch on the Dash, and it is working properly. If we provide Power to the A/C Compressor, the A/C Compressor does work, and Blows Cold. It appears we have Power to the ECU, but no Power from the ECU to the A/C Compressor. I am thinking there is a Sensor, that is telling the A/C Compressor not to turn on. Any help is greatly appreciated. Thank you. Quote Link to comment Share on other sites More sharing options...
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