Heater not working on passenger side?

KISURAA

MEMBER
2013 CHEVROLET MALIBU
2.5L
AUTOMATIC
157,000 MILES

Sometime ago my heater stopped working on my passenger side, it works perfectly fine on the driver's side, but blows warm in the middle and on the far right (Passenger) side it’s cold and with-it approaching winter I’m trying to see what I can do to get it fixed. I thought before it was the blend door but that wasn’t the problem, I checked both driver and passenger blend door and none were messed up. They worked perfectly fine, and I just don’t know what else it could be! Please help?

4 Replies

KEN L

MASTER CERTIFIED MECHANIC
47,665 POSTS

First, I would check the engine coolant level (engine cold) and if it's okay please check the mode actuator level and gear set up and if that seems to be okay, there is a mode actuator that is not closing completely. Here is the locations for each in the images below. Check out the images (below). Let us know what happens and please upload pictures or videos of the problem.

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Monday, October 17th, 2022 AT 10:17 AM

KISURAA

MEMBER
3 POSTS

What controls the hot and cold on the passenger side?

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Monday, October 17th, 2022 AT 5:45 PM

KISURAA

MEMBER
3 POSTS

Is there a video I can look up to help me figure out how to better change it?

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Monday, October 17th, 2022 AT 5:51 PM

KEN L

MASTER CERTIFIED MECHANIC
47,665 POSTS

That would be the temperature blend door actuator for the right side. here is the location and how to change it out, you may need to remove the glove box door first. Here is the video for the repair:

https://youtu.be/qS-_dLPwph8

Check out the images (below). Please let us know what happens.

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