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Home >> Cadillac >> 1969 >> Calais Not Available, Automatic Trans >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Automatic Temperature Control >> Operation >> Hi

Automatic Temperature Control: Operation: Hi

Operation in the HI setting is identical to the AUTO setting except that the blower operates at a fixed maximum speed and recirculated air is used when maximum cooling is required.

Fig 1: Control Panel - All Series
G09310827Courtesy of GENERAL MOTORS COMPANY