Heater does not blow hot air on passenger side

Tiny
GAIL BENNETT
  • MEMBER
  • 2009 CHEVROLET TAHOE
  • 138,000 MILES
Heater blows cold air out on passenger side while blowing hot air on driver side.
Sunday, November 29th, 2020 AT 7:06 AM

3 Replies

Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
Hello, I'm Danny.

It sounds like you are having an issue with the mode-blend door actuator. It is a small small electric motor that opens a door to send air flow throughout the HVAC unit to direct airflow. Here is a tutorial showing what is involved for its replacement:

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

I've attached picture steps below for your vehicle. This is based on the automatic HVAC system since you didn't specify in in your post. I've also included the steps to recalibrate the actuator after installation. Hope this helps and thanks for using 2CarPros.
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Sunday, November 29th, 2020 AT 2:15 PM
Tiny
GAIL BENNETT
  • MEMBER
  • 2 POSTS
Do the motors control the same functions in 2007 as 2009 non auto system?
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Sunday, November 29th, 2020 AT 3:56 PM
Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
Hello again.

There are many different variables. Can you please provide me with your VIN number (vehicle identification number) and I will get back to you with the proper information. Hope this helps and thanks again for using 2CarPros.

Danny-
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Monday, November 30th, 2020 AT 2:19 PM

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