Rear HVAC Housing

DISASSEMBLY

NOTE: The rear heater-A/C housing must be removed from the vehicle for service of the mode door actuator and blend door actuator and it must be disassembled for service of the A/C evaporator and the heater core. The blend-air door and mode-air door are only serviced with the respective housing.





1. Disconnect and isolate the negative battery cable.
2. Remove the rear heater-A/C housing and place it on a workbench Rear HVAC Housing.
3. Remove the rear blower motor power module . Rear Blower Motor Power Module - Removal
4. Remove the rear blower motor Blower Motor - Removal.
5. Remove the foam seal (2) from the flange (1) located at the bottom of the rear heater-A/C housing (3). If the foam seal is deformed or damaged, it must be replaced.





6. Remove the three screws (2) that secure the flange (1) to the bottom of the rear heater-A/C housing (3) and remove the flange.





7. Remove the two screws (1) that secure the rear expansion valve (3) to the tapping plate located on the end of the rear evaporator tubes (2) and remove the valve.
8. Remove and discard the O-ring seals and install plugs in, or tape over the opened evaporator tubes and expansion valve ports.





9. Remove the wire harness connector (7) from the lower rear heater-A/C housing (6).
10. Open the evaporator tube retaining bracket (3) located on the outboard side of the lower housing.
11. Remove the metal retaining clip (2) that secures the lower housing to the rear heater-A/C housing (4).
12. Remove the five screws (1 and 5) that secure the lower housing the rear heater-A/C housing and carefully remove the lower housing. Rotate and tilt the lower housing as necessary for removal.





13. Remove the screw (1) that secures the rear evaporator cover (3) to the outboard side of the rear heater-A/C housing (2) and remove the cover of the housing.





14. Carefully pull the rear A/C evaporator (4) out the bottom of the rear heater-A/C housing (3). Guide the evaporator tubes (2) past the heater core tubes (1). If the foam seals on the A/C evaporator are deformed or damaged, they must be replaced.





15. Disconnect the wire harness connector (3) from the rear blend door actuator (2) located on the outboard side of the rear heater-A/C housing (4).
16. Remove the two screws (1) that secure the rear blend door actuator to the rear heater-A/C housing and remove the actuator.





17. Disconnect the rear heater-A/C wire harness connector (1) from the rear mode door actuator (3) located on the outboard side of the rear heater-A/C distribution housing (2) and remove the wire harness from the rear heater-A/C housing (5).
18. Remove the three metal retaining clips (4) that secure the rear distribution housing to the rear heater-A/C housing.
19. Release the five plastic retaining tabs (4) that secure the rear distribution housing and rear heater-A/C housing together and separate the housings.
20. If required, remove the rear mode door actuator from the rear distribution housing Mode Door Actuator - Removal.





21. Remove the screw (1) that secures the rear heater core tubes (3) to the outboard side of the rear heater-A/C housing (4).
22. Pull the rear heater core (5) out of the top of the rear heater-A/C housing. If the foam seals on the heater core are deformed or damaged, they must be replaced.