Valve (Door) Actuator
There are five actuators used to control the HVAC system. They are driver and passenger mix door actuators, A/C door actuator, defroster actuator, and air inlet actuator. The actuators are specifically designed for the right and left side of the heater and A/C module. When servicing an actuator, be sure to replace it with the correct replacement actuator for the position being serviced.
A reversible DC motor in the actuator operates the door within the HVAC module.
The actuators contain a feedback potentiometer that informs the HVAC programmer of door position.