Air conditioner vents

Hi:
What I believe the problem is related to The mode door actuator.
The mode door actuator is a reversible, 12-volt direct current (DC), servo motor which mechanically positions the mode-air doors. The mode door actuator is located on the bottom of the HVAC housing.

The mode door actuator is interchangeable with the actuator for the blend-air door. Each actuator is contained within an identical black molded plastic housing with an integral wire connector receptacle. Each actuator also has an identical output shaft with splines that connect it to its respective door linkage and three integral mounting tabs that allow the actuator to be secured to the HVAC housing. The mode door actuator requires mechanical indexing to the mode door linkage.

OPERATION
The mode door actuator is connected to the body control module (BCM) through the vehicle electrical system by a dedicated five-wire lead and connector of the HVAC wire harness. The mode door actuator can move the panel-air door and the floor/defrost-air door (mode-air doors) in two directions. A potentiometer within the actuator allows the BCM to know the exact position of the mode-air doors at all times.

The mode door actuator can be diagnosed using a DRBIII(R) scan tool.

The mode door actuator cannot be adjusted or repaired and, if faulty or damaged, it must be replaced.

see the guide below for Blend door actuator replacement.. its not the exact same motor, but it is similar enough to give you an idea of whats in store

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

See diagram below for location Of Mode Door Actuator on your car

I hope I helped. Let me know if you have other questions.

Joe