Hello
It sounds like you have a rear air temperature blend door actuator that is out not changing the cold to hot. Here is a guide that will show you what you are in for when changing the actuator out.
https://www.2carpros.com/articles/replace-blend-door-motor
Here is the location for your car (below) REAR
I have also included the front ones as well because they go out from time to time I thought it would be good to have.
Check out the diagrams (Below)
Please let us know if you need anything else to get the problem fixed.
Cheers, Jack
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Wednesday, January 27th, 2021 AT 10:51 AM
(Merged)