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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> HVAC Systems - Manual >> Description and Operation >> Air Temperature Description and Operation >> HVAC Control Components >> A/C High Pressure Switch

A/C High Pressure Switch

The A/C system is protected by two pressure switches. The A/C high pressure switch is a two wire normally open switch. The A/C high pressure switch opens the A/C request signal when the A/C line pressure exceeds 3240 kPa (470 psi) + or - 20 psi. This prevents the A/C compressor from operating.