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Home >> Jeep Truck >> 2009 >> Commander 4WD V8-4.7L >> Repair and Diagnosis >> Heating and Air Conditioning >> Housing Assembly HVAC >> Service and Repair >> Overhaul >> Disassembly >> Front HVAC Housing

Front HVAC Housing






HOUSING-HVAC ASSEMBLY

NOTE: The HVAC housing must be removed from the vehicle and disassembled for service of the A/C evaporator.





1. Remove the HVAC housing assembly and place it on a workbench .
2. Remove the air distribution housing (3) from the HVAC housing (1) .
3. Remove the air inlet housing (2) from the HVAC housing .





4. Disconnect the HVAC wire harness (1) from the evaporator temperature sensor (2) and the blower motor resistor or power module (4) (depending on application).
5. Disconnect the wire harness for the blower motor (3) from the blower motor resistor or power module (depending on application).
6. Disengage the two HVAC wire harness retainers from the HVAC housing (5) and remove the wire harness.
7. Remove the blower motor .
8. Remove the blower motor resistor or power module, depending on application or Front Blower Motor Power Module - Removal.
9. Remove the evaporator temperature sensor Front Evaporator Temperature Sensor - Removal.





10. Remove the two bolts (1) that secure the A/C expansion valve (2) to the evaporator tube tapping block (3) located at the front of the HVAC housing (4).
11. Remove the A/C expansion valve from the evaporator tube tapping block and remove and discard the O-ring seals.
12. Install plugs in, or tape over the opened evaporator tube fittings and all expansion valve ports.





13. Carefully cut the foam seal (1) along the parting line (2) of the upper half of the HVAC housing (3) and the lower half of the HVAC housing (4). If the seal is deformed or damaged, it must be replaced.
14. Remove the three metal retaining clips (5) that secure the two halves of the HVAC housing together.
15. Remove the ten screws (6) that secure the two halves of the HVAC housing together.
16. Disengage the two plastic retaining clips (7) and separate the two halves of the HVAC housing.





17. Open the rubber seal (1) and carefully lift the A/C evaporator (2) and insulator (3) out of the lower half of the HVAC housing (4).
18. If required, remove the rubber seal from the lower half of the HVAC housing. If the seal is deformed or damaged, it must be replaced.
19. If required, remove the insulator from the A/C evaporator. If the insulator is deformed or damaged, it must be replaced.

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