Air Door Actuator / Motor: Description and Operation

BLEND DOOR ACTUATOR

The electronic blend door actuator is located in the side of the evaporator case assembly on the driver's side. The actuator control the position of the temperature blend door based on a low current signal from the FATC module. Internally an electronic circuit accepts the signal and positions the blend door with a small DC motor.

TEMP. ACTUATOR POTENTIOMETER

Also included is a blend door position potentiometer which provide feedback to the FATC module. The blend door actuator operates on the base of input information of the temperature setting lever setting signal. The in-vehicle, ambient, engine temperature sensor signal. And this A/C control module actuates the DC motor according to these signals, also controls the motor operation to adjust the air mix blend door opening.