Rear heater vents not working on 04 trailblazer.

AimeeYac
Posts: 1
Joined: Wed Feb 06, 2013 3:14 pm

Rear heater vents not working on 04 trailblazer.

Unread post by AimeeYac » Wed Feb 06, 2013 3:18 pm

Hi, the rear heater vents on my 04 trailblazer just blowcold air.The vents for the front system blowhot air when on. Please help!!!

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Karl
Posts: 83
Joined: Thu Oct 11, 2012 3:43 pm

Re: Rear heater vents not working on 04 trailblazer.

Unread post by Karl » Thu Feb 07, 2013 12:00 am

Sound like a common problem of a bad temperature door motor in the rear unit.
The rear unit is located behind the inside rear quarter trim panel on the pasenger side. This has almost all the same parts as the front, but work independently from the front.

The rear has a temperature door motor and a mode door motor (for changing the position of the airflow). They are the same part as the ones in the front dash, and fail just as often. There is a picture of one on this page for the Silverado- same thing...
temperature actuator
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