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Home >> Chevrolet >> 1977 >> Vega Base, 2D Hatchback, Automatic Trans >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Automatic Temperature Control >> Components & Functions >> Engine Thermal-Switch

Engine Thermal-Switch

Mounted on the right cylinder head, this switch delays initial operation of the Comfortron system in cool weather to allow engine coolant to warm up to approximately 120°F. This prevents a cold air blast from the heater.