Grand Caravan V6-3.8L (2009)
Air Door Actuator / Motor: Description and Operation
Blend Door Actuator - Description
Front
DESCRIPTION
The blend door actuators (1) for the front heating-A/C system are reversible, 12-volt direct current (DC) servo motors. Models with the front single zone
heating-A/C system have a single blend-air door, which is controlled by a single blend door actuator. Models with the front dual zone heating-A/C
system have dual 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 front HVAC air distribution housing. 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 front air distribution
housing which is mechanically connected to only the passenger side blend-air door.
The blend door actuators are contained within a black molded plastic housing with an integral wire connector receptacle (2), an output shaft with splines
(3) that connect them to the blend door linkage and three integral mounting tabs (4) that allow the actuators to be secured to the air distribution housing.
The blend door actuators do not require mechanical indexing to the blend door linkage, as they are electronically calibrated by the A/C-heater control.
The A/C-heater control must be recalibrated each time an actuator motor is replaced See: Testing and Inspection/Component Tests and General
Diagnostics/HVAC System Test.
The blend door actuators are interchangeable with the actuators for the mode-air doors and the recirculation-air door.
Rear
DESCRIPTION
