GM: Electra/Park Avenue/Ninety-Eight 1990-1993

Pressure Cycling Switch or Coolant Fan Switch

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Fig. Fig. 1 A/C system switch locations

REMOVAL & INSTALLATION



  1. Review the list under Useful Notes, above.
  2.  
  3. Disconnect the negative battery cable.
  4.  
  5. Remove the rear sight shield.
  6.  
  7. Disconnect the electrical connector from the cycling switch, located on the accumulator; or the fan switch, located on the refrigerant line near the compressor.
  8.  
  9. Quickly unscrew the switch from its Schrader valve on the accumulator or line. If you unscrew the switch too slowly, refrigerant will escape to the atmosphere.
  10.  

To install:

  1. Lubricate new O-rings with refrigerant oil and install to the switch.
  2.  
  3. Quickly install to the accumulator or line. If you screw in the switch too slowly, refrigerant will escape to the atmosphere.
  4.  
  5. Connect the connector.
  6.  
  7. Install the sight shield.
  8.  
  9. Connect the negative battery cable and inspect the system for proper operation.
  10.  

 
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