A/C Control panel intermittent, is there a way to troubleshoot the power supplies on the control board?

2002 HONDA ACCORD

180,000 MILES • 4 CYL • 2WD • MANUAL

JVTECH7

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When working all functions seem to work normally. Turning fan control from off, if mode LED illuminates, system works, air controls direct air properly heat/cold respond. When LEDs do not illuminate, fan speed functions but no other functions work. Is there a way to troubleshoot the power supplies on the control board?

Jul 26, 2022 at 4:03 AM

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It sounds like you have an HVAC control panel that is going out, but to be sure here is a guide to help you check for power and ground with the HVAC wiring diagrams so you can see which wires to test in the images below. I have also included how to replace the control panel as well.

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

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

Images (Click to enlarge)

Jul 26, 2022 at 11:29 AM