The A/C compressor refuses to start, while my fan continues to run

2018 CHEVROLET COLORADO

112,000 MILES • V6 • 2WD • AUTOMATIC

MBOZE17

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This causes my ac to blow hot air. I have replaced fuses, replaced ac pressure switch, and Freon levels are good. The funny thing is I can restart my battery and the A/C will work perfect for about 12-24 hours. Can you help me with diagnosing this issue?

Jun 26, 2022 at 8:12 AM

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It sounds like the HAC control module is no good. To be sure we can do a CAN scan which is in this guide and video. I have included how to change the HVAC module out and the A/C wiring diagrams so you can see how the system works.

https://www.2carpros.com/articles/can-scan-controller-area-network-easy

Check out the diagrams (below). Let us know what happens and please upload pictures or videos of the problem.

Images (Click to enlarge)

Jun 27, 2022 at 9:31 AM