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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 677 (Heating, Ventilation And Air Conditioning) >> Repair Instructions >> Air Conditioning (A/C) High Pressure Switch Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 Chevrolet Silverado, and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

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.
  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 & Recharging .
  7. Leak test the fittings of the components using the J 39400-A  .
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