Actuator. air inlet. PartQualifier: air inlet. An Actuator used to control the HVAC air inlet Door. An Actuator used to control the HVAC defrost mode Door. An Actuator used to control the HVAC floor mode Door. Switches modes for the blend Doors. Air Inlet. Blend. Defrost Mode. Floor Mode. Mix. Temperature Valve. Air distributor. Temperature motor.