Functions of Air Door Actuators

Temperature Blend Door Actuators: The temperature blend door actuator controls the temperature of the air flowing from the vents by mixing hot and cold air from the heater core and the evaporator.

Mode Door Actuators: The mode door actuator controls what vents have air flow, i.e. floor, panel or front, defrost, or any combination of those.

Recirculation Door Actuators: The recirculation door actuator controls the intake of air into the system, either bringing outside air in or using inside air in recirculation.

Heater Valve Actuator: Some air door actuators are used to drive heater valves.