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HVAC Housing: Installation

WARNING: This page is about a different car, the 2005 Jeep Liberty. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Use only the specified O-rings as they are made of special material for R-134a. Use only refrigerant oil of the type required for the A/C compressor in the vehicle.
  1. Position the HVAC housing to the dash panel. Be certain that the evaporator condensate drain tube and the housing mounting studs are inserted into their correct mounting holes.
  2. Install the nuts that secure the HVAC housing to the dash panel in the engine compartment. Tighten the nuts to 6 N.m (53 in. lbs.).
  3. Connect the HVAC system vacuum supply line connector.
  4. Unplug or remove the tape from the heater core tubes and connect the heater hoses to the heater core tubes.
  5. If the vehicle is not equipped with A/C, go to step  13. If the vehicle is equipped with A/C, unplug or remove the tape from the liquid and suction line fittings and the evaporator tapping block.
  6. Lubricate new rubber O-ring seals with clean refrigerant oil and install them on the liquid and suction line fittings.
  7. Connect the liquid and suction lines to the evaporator tapping block.
  8. Install the nuts that secure the liquid and suction lines to the evaporator tapping block. Tighten the nuts to 23 N.m (17 ft. lbs.).
  9. Install the accumulator and mounting bracket to the mounting studs on the dash panel. Tighten the nuts to 4.5 N.m (40 in. lbs.).
  10. Install the instrument panel (Refer to INSTRUMENT CLUSTER - INSTALLATION).
  11. Evacuate the refrigerant system (Refer to HEATING & AIR CONDITIONING/PLUMBING - STANDARD PROCEDURE - REFRIGERANT SYSTEM EVACUATE) .
  12. Charge the refrigerant system (Refer to HEATING & AIR CONDITIONING/PLUMBING - STANDARD PROCEDURE - REFRIGERANT SYSTEM CHARGE) .
  13. Reconnect the negative battery cable.
  14. If the heater core is being replaced, flush the cooling system (Refer to COOLING - STANDARD PROCEDURE - COOLING SYSTEM CLEANING/REVERSE FLUSHING) .
  15. Refill the engine cooling system (Refer to COOLING - STANDARD PROCEDURE - COOLING SYSTEM REFILL) .
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