Rear HVAC Housing

DISASSEMBLY

NOTE: The rear HVAC housing must be removed from the vehicle for service of the mode door actuator, blend door actuator, blower motor, heater core, blower motor resistor or power module and it must be disassembled for service of the A/C evaporator, mode-air door and the blend-air door.

1. Remove the rear HVAC housing and place it on a workbench. Service and Repair

2. Carefully remove the foam seal from the flange located at the bottom of the rear HVAC housing. If the seal is deformed or damaged, it must be replaced (Figure 1).

3. If required, remove the rear A/C expansion valve from the rear A/C evaporator.

4. Remove the four retaining clips and four screws that secure the flange to the rear HVAC housing and remove the flange.











Figure 1 Flange and Foam Seal

5. Remove the screw that secures the rear heater core tube bracket to the rear HVAC housing (Figure 2).

6. Release the two retaining tabs that secure the rear heater core in the rear HVAC housing.

7. Carefully pull the rear heater core out of the end of the rear HVAC housing. If the foam seals on the heater core are deformed or damaged, they must be replaced.











Figure 2 Rear Heater Core and Bracket

8. Disconnect the rear HVAC wire harness from the rear blower motor resistor or power module (depending on application), rear blower motor, rear mode door actuator and the rear blend door actuator (Figure 3).

9. Release the retaining tab that secures the connector of the rear HVAC wire harness to the rear HVAC housing and remove the wire harness from the housing.

10. Remove the rear blower motor resistor or power module (depending on application). Blower Motor Resistor

11. Remove the rear blower motor. Service and Repair

12. Remove the rear mode door actuator and rear blend door actuator.











Figure 3 Rear HVAC Wire Harness

13. Remove the 15 screws and three metal retaining clips that secure the two halves of the rear HVAC housing together (Figure 4).

14. Release the three plastic retaining tabs that secure the two halves of the rear HVAC housing together and separate the housing halves.











Figure 4 Housing-Rear HVAC

15. Carefully lift the rear A/C evaporator out of the inboard half of the rear HVAC housing (Figure 5).

16. Remove the mode-air door and blend-air door from the inboard half of the rear HVAC housing. If the foam seal on any air-door is deformed or damaged, the air door must be replaced.











Figure 5 Rear HVAC Air Doors