Rear HVAC Housing

DISASSEMBLY

NOTE: The rear heater-A/C housing must be removed from the vehicle and disassembled for service of the A/C evaporator, heater core, mode-air door and the blend-air door.





1. Disconnect and isolate the negative battery cable.
2. Remove the rear heater-A/C housing (1) and place it on a workbench HVAC Housing - Removal.
3. Disconnect the wire harness connector (1) from the rear blower motor (2).
4. Remove the three screws (3) that secure the rear blower motor to the rear heater-A/C housing (4) and remove the blower motor.





5. Disconnect the wire harness connector (4) from the rear blower motor power module (3).
6. Remove the screw (2) that secures the rear blower motor power module to the rear heater-A/C housing (1).
7. Disengage the rear blower motor power module from the rear heater-A/C housing and remove the module.





8. Disconnect the wire harness connector (3) from the rear blend door actuator (4).
9. Remove the three screws (1) that secure the rear blend door actuator to the rear heater-A/C housing (2) and remove the actuator.





10. Disconnect the wire harness connector (2) from the rear mode door actuator (1).
11. Remove the three screws (4) that secure the rear mode door actuator to the rear heater-A/C housing (3) and remove the actuator.





12. Disengage the rear heater-A/C wire harness connector (4) from the retaining tab (5).
13. Disengage the rear heater-A/C wire harness (1) from the retaining tabs (3) and remove the wire harness from the rear heater-A/C housing (2).






NOTE: If the foam seal for the flange is deformed or damaged, the seal be replaced.

14. Carefully remove the foam seal (4) from the bottom of the rear heater-A/C housing (3). Replace the seal if it is deformed or damaged.
15. Remove the screw (2) that secures the flange (1) to the rear heater-A/C housing.
16. Disengage the retaining tabs that secure each end of the flange to the rear heater-A/C housing and remove the flange.






NOTE: If a foam seal around the heater core is deformed or damaged, the seal must be replaced.

17. Carefully pull the rear heater core and tube assembly (1) out of the side of the rear heater-A/C housing. If the foam seals on the heater core are deformed or damaged, they must be replaced.





18. Remove the two bolts (1) that secure the rear A/C expansion valve (2) to the rear evaporator.
19. Disconnect the rear A/C expansion valve from the rear evaporator tubes.





20. Remove the six screws (3) that secure the lower heater-A/C housing (4) to the two upper heater-A/C housing halves (2).
21. Carefully disengage the two plastic retaining clips (1) and remove the lower housing.





22. Remove the fifteen screws (1) that secure together the two halves of the rear heater-A/C housing (3 and 4).
23. Carefully disengage the three plastic retaining clips (2) and separate the two housing halves.






NOTE: If the foam seal around the A/C evaporator is deformed or damaged, the seal must be replaced.

24. Carefully lift the rear A/C evaporator (1) out of the outboard half of the rear heater-A/C housing (2) and remove and discard the rubber O-ring seals (3). If the foam seals around the rear evaporator are deformed or damaged, they must be replaced.






NOTE: If a rubber seal on an air door is deformed or damaged, the air door must be replaced.

25. Remove the blend-air door (1) and the mode-air door (2) from the outboard side of the rear heater-A/C housing (3).