Air Door Actuator / Motor Relay: Description and Operation

Temp. Actuator Potentiometer (Automatic Temperature Control)

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. Also included is a blend door position potentiometer which provides feedback to the FATC module. The blend door actuator operates based on input information of the temperature setting signal. And this NC control module actuates the DC motor according to these signals, also controls the motor operation to adjust the air mixblend door opening.