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

Tiny
JVTECH7
  • MEMBER
  • 2002 HONDA ACCORD
  • 4 CYL
  • 2WD
  • MANUAL
  • 180,000 MILES
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?
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Tuesday, July 26th, 2022 AT 4:03 AM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 43,351 POSTS
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.

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Tuesday, July 26th, 2022 AT 11:29 AM

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