Mode Door Actuator: Description
WARNING: This page is about a different car, the 2005 Jeep Liberty. However, it is still accessible from the selected car via links, so may be relevant.
Both the heating-only system and the heating-A/C system use vacuum operated mode door actuators to control the movement of the mode-air doors within the HVAC housing. See Fig 1.
When vacuum is supplied by the A/C-heater control to one side of the defrost/floor actuator or the panel door actuator, the actuator rod is pulled into the actuator, which moves the mode door lever and mode-air door in one direction. When vacuum is supplied by the A/C-heater control to the other side of the actuator, the rod moves the mode-air door in the other direction.
The mode door actuators cannot be adjusted or repaired and, if faulty or damaged, they must be replaced.
| 1 - MODE DOOR ACTUATOR |
| 2 - MOUNTING PROVISION |
| 3 - VACUUM LINE CONNECTORS |