Commander 2WD V8-4.7L (2008)
Air Door Actuator / Motor: Description and Operation
Blend Door Actuator
Front Controls
DESCRIPTION
The blend door actuators (1) are reversible, 12 volt direct current (DC), servo motors. Models equipped with the MTC single zone heating-A/C system
have a single blend-air door, which is controlled by a single blend door actuator. Models with the ATC dual zone heating-A/C system have two blend-air
doors, which are controlled by two blend door actuators.
The blend door actuator for the single zone heating-A/C system is located on the driver side end of the HVAC air distribution housing, close to the dash
panel.
For the dual zone heating-A/C system, the same blend door actuator used for the single zone system becomes the driver side blend door actuator, which
is mechanically connected to only the driver side blend-air door. A second separate blend door actuator is also located on the passenger side of the
HVAC air distribution housing which is mechanically connected to only the passenger side blend-air door.
The blend door actuators are interchangeable with each other, as well as with the actuators for the mode-air door and the recirculation-air door. Each
actuator is contained within an identical black molded plastic housing with an integral wire connector receptacle (2). Each actuator also has an identical
output shaft with splines (3) that connects it to its respective door linkage and three integral mounting tabs (4) that allow the actuator to be secured to the
HVAC housing. The blend door actuators do not require mechanical indexing to the blend-air doors, as they are electronically calibrated by the
A/C-heater control.
Rear Controls
DESCRIPTION
The rear blend door actuator (1) is a reversible, 12 volt direct current (DC), servo motor. The rear blend door actuator is located on the back of the rear
HVAC housing. The rear blend door actuator is interchangeable with the actuator for the mode-air door. Each actuator is contained within an identical
molded plastic housing with an integral wire connector receptacle (2). Three integral mounting tabs (4) allow the actuator to be secured to the rear
