Housing, HVAC: Assembly: Housing-HVAC
CAUTION:
Be certain to adjust the refrigerant oil level when servicing the A/C refrigerant system. See Heating and Air Conditioning/Plumbing/OIL, Refrigerant - Standard Procedure . Failure to properly adjust the refrigerant oil level will prevent the A/C system from operating as designed and can cause serious A/C compressor damage.
NOTE:
When replacing multiple A/C system components, refer to the REFRIGERANT OIL CAPACITY to determine how much oil should be added to the refrigerant system. See Heating and Air Conditioning/Plumbing/OIL, Refrigerant - Standard Procedure .
NOTE:
If the A/C evaporator is being replaced, add 60 milliliters (2 fluid ounces) of refrigerant oil to the refrigerant system. Use only refrigerant oil of the type recommended for the A/C compressor in the vehicle.
NOTE:
LHD model shown in illustrations. RHD model similar.
- If removed, install the foam seal (2) over the tapping block of the A/C evaporator (1). If the seal is deformed or damaged, it must be replaced.
- Install the A/C evaporator into the lower half of the HVAC housing (3). Make sure that the evaporator drain within the HVAC housing is clean and unrestricted and that the insulator around the A/C evaporator is properly installed.
- Install the upper half of the HVAC housing (3) onto the lower half of the HVAC housing (4).
- Install the screws (2) that secure the two halves of the HVAC housing together. Tighten the screws to 2.2 N.m (20 in lbs.).
- Install the HVAC wiring harness (1). Make sure the harness is routed through all wiring retainers.
- Remove the tape or plugs from the evaporator tube fittings and all of the expansion valve ports.
- Lubricate new rubber O-ring seals with clean refrigerant oil and install them on the evaporator tube fittings. Use only the specified O-rings as they are made of a special material for the R-134a system. Use only refrigerant oil of the type recommended for the A/C compressor in the vehicle.
- Install the A/C expansion valve (2) onto the evaporator tube tapping block located within the foam seal (3).
- Install the two bolts (1) that secure the A/C expansion valve to the evaporator tube tapping block. Tighten the bolts to 11 N.m (97 in. lbs.).
- Install the evaporator temperature sensor (2). See Heating and Air Conditioning/Controls/SENSOR, Evaporator Temperature - Installation .
- Install the blower motor resistor or power module (3), depending on application. See Heating and Air Conditioning/Controls/RESISTOR, Blower Motor - Installation or Heating and Air Conditioning/Controls/MODULE, Power - Installation .
- Install the blower motor (4). See Heating and Air Conditioning/Distribution/MOTOR, Blower - Installation .
- Connect the HVAC wire harness (1) to the evaporator temperature sensor, blower motor resistor or power module (depending on application) and the blower motor.
- Install the two HVAC wire harness retainers (5) onto the blower motor.
- Install the heater core tubes (4) and the flange (2) to the front of the HVAC housing (3).
- Install the two screws (1) that secure the flange to the HVAC housing. Tighten the screws to 2.2 N.m (20 in. lbs.).
- Install the air inlet housing (2) onto the HVAC housing (1). See Heating and Air Conditioning/Distribution/HOUSING, HVAC - Installation .
- Install the air distribution housing (3) onto the HVAC housing. See Heating and Air Conditioning/Distribution/HOUSING, HVAC - Installation .
- Install the HVAC housing assembly. See Heating and Air Conditioning/Distribution/HOUSING, HVAC - Installation .
- If the A/C evaporator is being replaced, add 60 milliliters (2 fluid ounces) of refrigerant oil to the refrigerant system. When replacing multiple A/C system components, refer to the REFRIGERANT OIL CAPACITY to determine how much oil should be added to the refrigerant system. See Heating and Air Conditioning/Plumbing/OIL, Refrigerant - Standard Procedure . Use only refrigerant oil of the type recommended for the A/C compressor in the vehicle.