Air Inlet Mode Door Position

WARNING: This page is about a different car, the 2012 Ford Pickup. However, it is still accessible from the selected car via links, so may be relevant.

The air inlet mode door actuator moves the air inlet door between the fresh and RECIRC positions on command from the HVAC module. 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 door. The potentiometer circuit consists of a 5-volt reference signal connected to one end of a variable resistor, and a signal ground connected to the other. A signal circuit is connected to a contact wiper, which is driven along the variable resistor by the actuator shaft. The signal to the HVAC module from the contact wiper indicates the position of the air inlet door.

The air inlet mode door actuator is located on the air inlet duct behind the glove compartment. The HVAC module powers the actuator motor to move the air inlet door to the desired position. Under certain conditions, the air inlet door may stop at a midpoint to provide a mix of fresh and recirculated air to meet cooling demands.