Air Inlet Mode Door Position

The air inlet mode door actuator contains a reversible electric motor and potentiometer. The potentiometer allows the HVAC module to monitor the position of the air inlet mode door. The HVAC module adjusts the air inlet door depending on the humidity measured by the in-vehicle temperature/humidity sensor. If the vehicle cabin becomes too humid and recirculated air is not selected, the HVAC module adjusts the air inlet door to allow more recirculated air. When the humidity level drops, it adjusts back to fresh air.