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Home >> Chevrolet >> 1972 >> Chevelle Base, Not Available, 6.6L Eng VIN S, Not Available Trans >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Automatic Temperature Control >> Components & Functions >> Ambient Switch

Ambient Switch

Located on the blower side of the evaporator case. When temperature at the switch is above 40°F the compressor is operating. At a temperature below 25°F at the switch, the compressor will not operate. This ambient switch operates the A/C compressor coil switch.