The driver side has heat but the passenger side is blowing cold air?

2003 CHEVROLET AVALANCHE
335,000 MILES
Avatar
CARVEREOD
  • MEMBER
  • 1 POST
The heater blew only cold air, so I replaced Blend Door Actuator on lower passenger side. Now the driver side has heat but the passenger side is blowing cold air. I attempted to have system relearn (calibrate) by disconnecting fuse, wait, reconnect, run engine, turn off then turn on…the information for this method contradicts itself. I have seen where it says 10 seconds and 2 minutes for the fuse removal. So, I’m lost, can you please help?
Oct 22, 2022 at 10:00 AM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
Advertisement
Avatar
STRAILER
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 54,178 POSTS
I believe the passenger side actuator is on the top of the HAVC system.

Here is a guide to help you see what's going on:

https://www.2carpros.com/articles/replace-blend-door-motor

Scroll down to see the locations. Please go over this guide and report back.

Oct 22, 2022 at 6:07 PM
Advertisement
Avatar
CARVEREOD
  • MEMBER
  • 1 POST
Okay. So, I replaced the Blend Motor Actuator on the 2003 Chevrolet Avalanche because it was blowing hot on the driver side and cold on passenger side. I replaced it twice. I'm still having the same problem. I attempted to have both parts "relearn" (calibration). I still have the same problems. The blend door actuator was located on the passenger side floorboard area. Can you help?
Oct 27, 2022 at 8:12 PM