Problem with defrost/vent

2008 CADILLAC STS
124,000 MILES • 4.6L • V8 • 2WD • AUTOMATIC
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BADLEE69
  • MEMBER
  • 1 POST
Hello,
My heat and AC work fine, however recently after hearing some odd clicking and shutters. Now I only get warm or cold air blowing out of the side vents and floor, none from the center vents and more importantly, none from my defrost setting, which makes it really hard with winter coming on.
My question is, which actuator is out and where would it be located on my car?
Any information you guys can provide would be greatly appreciated.
Thank you ahead of time!
Dec 5, 2017 at 3:25 PM
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STRAILER
  • CERTIFIED EXPERT
  • 53,854 POSTS
Hello,

Yes the clicking is telling you you have a air blend door actuator that is out. Here is a guide that will give you an idea of what you are in for when changing the unit out:

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

Here is where the actuators are in your car (below).

Let us know what happens and please upload pictures or videos of the problem.

Cheers, Ken
Dec 7, 2017 at 11:23 AM