Sebring Sedan L4-2.4L (2007)
Air Door Actuator / Motor: Description and Operation
Mode Door Actuator
Description
DESCRIPTION
The mode door actuator (1) for the heating-A/C system is a reversible, 12-volt Direct Current (DC) servo motor, which is mechanically connected to the
mode-air doors. The mode door actuator is located on the right side of the HVAC air distribution housing.
The mode door actuator is interchangeable with the actuators for the blend-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
connect it to its respective door linkage and integral mounting tabs (4) that allow the actuator to be secured to the air distribution housing. The mode
door actuator does not require mechanical indexing to the mode-air doors, as it is electronically calibrated by the A/C-heater control.
Operation
OPERATION
The mode door actuator is connected to the A/C-heater control through the vehicle electrical system by a dedicated two-wire lead and connector of the
instrument panel wire harness. The mode door actuator can move the mode-air door in two directions. When the A/C-heater control pulls the voltage on
one side of the motor connection high and the other connection low, the mode-air door will move in one direction. When the A/C-heater control reverses
the polarity of the voltage to the motor, the mode-air door moves in the opposite direction. Once the A/C-heater control makes the voltage to both
connections high or both connections low, the mode-air door stops and will not move.
The A/C-heater control uses a pulse-count positioning system to monitor the operation and relative position of the mode door actuator and the mode-air
door. The A/C-heater control learns the mode-air door stop positions during the calibration procedure and will store a diagnostic trouble code (DTC) for
any problems it detects in the mode door actuator circuits.
The mode door actuator cannot be adjusted or repaired and it must be replaced if found inoperative or damaged.
