Silverado's HVAC control panel randomly shuts off in the winter

Brian Shaw · December 25, 2022

My 2014 Silverado for the most part has been trouble free. However, for the past 3 years, my HVAC control panel will randomly shut off in the dead of winter, especially when the temperatures are below 20 degrees. After driving for @10 minutes with the heat cranking, the entire HVAC control panel will shut off, including the control knob lights. Then after @5 minutes, the control panel will turn back on, and act fine for the rest of the drive. This happens 2 to 3 times during the winter. I should mention that I just recently checked the grounds under the dash, located by both A pillars, and they were fine. I also cleaned up all the grounds on the frame this past summer. Can my problem be resolved by a HVAC system reset, or is the HVAC control module going bad?

rav3 · December 25, 2022

I would start on the simple & easy stuff. I'd pull the connector plug(s) & spray with electrical connector cleaner to see if this might correct any bad connection.

Brian Shaw · December 26, 2022

Thanks for your reply. I'll try that, but I just watched a YouTube clip posted by South Main Auto Repair that repaired a 2014 GMC Sierra with the exact same issues. This truck's control panel was shutting off in really cold temperatures, just like mine, and then would suddenly come back on. It ended up needing a new HVAC control module. I'm hoping that it's just a loose connection, because a new HVAC control module would have to be recalibrated at a shop.

rav3 · December 26, 2022

31 minutes ago, Brian Shaw said:

Thanks for your reply. I'll try that, but I just watched a YouTube clip posted by South Main Auto Repair that repaired a 2014 GMC Sierra with the exact same issues. This truck's control panel was shutting off in really cold temperatures, just like mine, and then would suddenly come back on. It ended up needing a new HVAC control module. I'm hoping that it's just a loose connection, because a new HVAC control module would have to be recalibrated at a shop.

Eric is very good at finding electrical issue. I follow his channel.