HVAC

VINCENT GRANT

MEMBER
1999 BUICK REGAL
150,000 MILES

I have air blowing through the defrost, middle, and floor vents at the same time. However, if I select the defrost, the windshield clears up relatively quickly. When I increase the temperature, the air on the passenger side heats up as expected. The air on the driver's side remains cold.

Friday, June 15th, 2018 AT 6:05 PM

1 Reply

ASEMASTER6371

MECHANIC
52,796 POSTS

Good afternoon.

The actuator on the left side sounds like it is not functioning. I attached pictures and the procedure for replacing it.

As far as the other issue, do you have sufficient air flow from the vents with the AC on?

Roy

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

REMOVAL PROCEDURE

imageZoom/Print

1. Remove the left instrument panel insulator.
2. Remove the knee bolster.
3. Disconnect the electrical connector from the temperature valve electric actuator.

imageZoom/Print

4. Remove the mounting screws from the temperature valve electric actuator.
5. Remove the temperature valve electric actuator.

Images (Click to make bigger)