Item Description: The HVAC air vent door actuator is constructed from a plastic housing, a small electric motor and a plastic gear set. A door position sensor is also incorporate into the unit to send feed back information to the climate control computer. Air door actuator also called heater blend door actuator controls the flow and temperature of air into the interior of the vehicle. The Signs of A Bad Blend Door Actuator: The heater blowing cold air. The air conditioner blowing hot air. Not able to adjust the heater temperatures. A ticking sound comes from the dashboard. Applications: 2008-2012 Buick Enclave 2009-2012 Chevrolet Traverse .
