Heat on Passenger Side Only / No Defroster or Foot Area Air

Tiny
JOHN3648
  • MEMBER
  • 2014 CHEVROLET SILVERADO
  • 5.3L
  • V8
  • 4WD
  • AUTOMATIC
  • 172,000 MILES
I drove the truck for the first time today since the battery had died and it was jumpstarted. I noticed that the heat was only warm on the passenger side and the driver side is blowing cold air. Also, the only spot that air comes out is the dash vents, when switched to defrost or to the feet area it does not switch.

It seems like a panel mode actuator, but that doesn't explain the heat only on once side, that seems like a blend door actuator. I find it odd that both would go at the same time.

I attempted to reset the HVAC actuators by pulling the HVAC fuses and putting them back in, however that did not work. Any help would be appreciated!
Friday, April 3rd, 2026 AT 1:43 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 55,302 POSTS
Yep, the reset is a good idea, I would try a hard reset for the system this guide/video can show you how to do it correctly.

https://www.2carpros.com/articles/step-by-step-guide-to-reset-your-cars-hvac-system-an-essential-for-every

and

https://www.youtube.com/watch?v=INiDRO5A5MY&pp=0gcJCdkKAYcqIYzv

It sounds like two actuators are not working after the battery reconnect. Please go over these guides and get back to us. Ken
Was this
answer
helpful?
Yes
No
Saturday, April 4th, 2026 AT 9:04 AM

Please login or register to post a reply.