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Home >> GMC >> 1999 >> Forward Control 7.4 B >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> HVAC System >> Operation >> A/C Compressor Refrigerant Pressure Switch

A/C Compressor Refrigerant Pressure Switch

The A/C compressor refrigerant (evaporator low) pressure switch will interrupt A/C compressor clutch operation if A/C refrigerant pressures drop below approximately 5.5 psi (0.38 kg/cm2 ). This switch is located on suction line, near evaporator.