GMC 9118283 Valve,A/C Compressor Pressure Relief

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When it comes to the HVAC Pressure Switch, it is threaded onto a Schrader valve and this shows that there is no need for discharging the air conditioning system so as to replace it. Nonetheless, if either extreme occurs, this sensor will protect the system from running. To modify it, unplug the electrical connector from the sensor first. Next, unscrew the sensor from the Schrader valve using a back-up wrench on the fitting for the sensor to avoid damaging the refrigerant line. Then lubricate switch 0-ring with clean refrigerant oil of correct type. After screwing on new sensor threads until hand tight and then tighten securely. Finally, reconnect electrical connector.

The pressure sensor is located at the compressor mounted to the lines.

After unplugging the electrical connector, the next step is to unscrew the pressure sensor.

The pressure sensor is located on the hard line from the condenser to the air conditioning thermostatic expansion valve (TXV).

The electrical connector connected to the pressure sensor should be disconnected.

Lubricate the switch O-ring with clean refrigerant oil of the correct type.

After raising the vehicle, the right front wheel and inner fender splash shield should be removed.

Be sure to discard the old sealing O-rings to prevent leaks and plug all open lines and fittings to prevent contamination of the air conditioning system.

Reconnect the electrical connector.

Before starting the removal process, the right front wheel lug nuts should be loosened, and the vehicle should be raised and securely supported on jackstands.

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