Climate control knob not working?

Tiny
KEN N SAM JOHNSON
  • MEMBER
  • 2015 CHEVROLET SILVERADO
  • 4.3L
  • V6
  • 4WD
  • AUTOMATIC
  • 180,000 MILES
When I turn my climate control knob, nothing happens. My screen reads "off" every time I turn it. I can turn on the air or the heat. It was working fine in the morning. When I got in my truck after work, nothing would come on. I don't recall any funny noises, sounds, etc.
Thursday, May 8th, 2025 AT 8:25 AM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,601 POSTS
Hello,

It sounds like the blower motor has stopped working but I need more information. When you say, "I can turn on the air or the heat" does the system come on or? Do you hear the blower motor come on? It could be a bad HVAC control module; I would do a CAN scan on the system to see which faults come up.

This video will show you how:

https://youtu.be/u-4syLc-ifQ

Also, you should check the 9 fuses that I have listed below.

This guide can help:

https://www.2carpros.com/articles/how-to-check-a-car-fuse

Check out the images (below). Let us know how it goes.
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Thursday, May 8th, 2025 AT 11:26 AM

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