Air Distribution Door Actuator
WARNING: This page is about a different car, the 2018 Ford Focus. However, it is still accessible from the selected car via links, so may be relevant.
The air distribution door actuator is a stepper motor style actuator. The HVAC control module monitors the position of the air distribution door by counting the motor steps as it rotates. The HVAC control module drives the actuator motor in the direction necessary to move the air distribution door to the position set by the air distribution control selection knob.