Hello,
This sounds like a temperature blend door actuator failure. Here is a guide that will show you what you are in for when doing the job.
https://www.2carpros.com/articles/replace-blend-door-motor
Here is how the job is done on your car for both drivers and passengers side.
Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.
Cheers,
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Wednesday, December 11th, 2013 AT 7:24 AM