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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Heating, Ventilation And Air Conditioning >> Repair Instructions >> Air Conditioning (A/C) High Pressure Switch Replacement >> Installation Procedure

Installation Procedure

Important:  If you reinstall an existing control switch in the compressor, use a new O-ring and a new retainer ring. An O-ring and a retainer ring is included in a new switch kit.

  1. Lubricate the new O-ring using new 525 viscosity refrigerant oil.
  2. Install the new O-ring into the groove in the switch cavity.
  3. Lubricate the control switch housing using new 525 viscosity refrigerant oil.
  4. Install the switch (2) into the switch cavity until the switch bottoms in the cavity.
    Fig 1: Installing Air Conditioning High Pressure Switch Electrical Connector
    G01645589Courtesy of GENERAL MOTORS CORP.
  5. Install the A/C high pressure switch snap ring using a pair of 90 degree angle pliers or J 5403.  Ensure that the high point of the curved sides is adjacent to the switch housing. Ensure that the snap ring is properly seated in the switch cavity retaining groove.
  6. Evacuate and recharge the system. Refer to REFRIGERANT RECOVERY AND RECHARGING .
  7. Leak test the fitting(s) of the repaired or reinstalled components using the J 39400-A. 
  8. Install the engine cover. Refer to ENGINE COVER REPLACEMENT in Interior Trim.
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