Yes the blend door actuator will cause the heater or air conditioner not to work right.
Here is a guide that will give you an idea on what you are in for when doing the job:
https://www.2carpros.com/articles/replace-blend-door-motor
Here is what it will be like on your car (below) I gave both air control and temperature control actuators:
Please let us know what happens.
Cheers, Ken
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Tuesday, October 3rd, 2017 AT 11:07 AM