Air Inlet 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 inlet door actuator is a stepper motor style actuator. The HVAC control module monitors the position of the air inlet 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 inlet door to the position set by the recirculation button and the in-vehicle temperature and humidity sensor information.