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Home >> Chevrolet >> 1990 >> APV >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Heater System >> Operation >> Operating Modes >> OFF-VENT Mode

OFF-VENT Mode

Vent valve regulates flow of outside air into passenger compartment. In OFF mode, forced (blower) air is directed to floor outlet. In VENT mode, the instrument panel ducts are open.

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