Refrigerant Pressure Sensor / Switch: Service and Repair

1985 Oldsmobile Delta 88 V6-231 3.8LSECTION Service and Repair

1. Disconnect negative battery cable. Under normal conditions, it is not necessary to discharge system refrigerant during this procedure, as switch unit fitting is supplied with a Schrader valve.
2. Disconnect switch harness connection. Unscrew unit from accumulator.
3. When installing new switch unit, install new oiled O-ring and torque switch to 7.5 ft. lbs. Be careful not to over tighten switch.
4. Reconnect harness and battery cable.



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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • You smell fuel, burning insulation, or see smoke.
  • Brakes feel soft, pull hard to one side, or make grinding noises.
  • The engine overheats, stalls repeatedly, or misfires under load.
  • You are missing required tools, torque specs, or safe lifting equipment.
  • You are not confident in the next step or safety outcome.