1993 Chevrolet Corvette Owner's Manual - Page 138

Heating and VentMion In these settings, the air conditioner compressor doesn't run. Outside air enters the vehicle as indicated. For each setting, adjustthe temperature control lever and-fanspeed as desired. 4 (Vent): In this setting, outside air flows through the instrument panel outlets. (Hwt): .In this setting, most air flows through heater ducts near the floor. Some air will also flow through the defroster vents. If your vehiclehas an engine block heater and you use it during cold weather, 0°F (-18°C) or lower,your heating system will more quickly provide ,heatbecause the engine coolant is already warmed. See Index under the Engine Block Heater. Defogging and Defrosting YoUr vehicle has two settings for clearing your windows.The-air conditioner compressor will run i both n of these settingsto remove moisture from the air when the temperature is above freezing. For each setting, adjust the temperature control lever and fan speed as desired. (@ (Defrost):This setting directs 90% of the air through the windshield defroster ventsand the side window vents, and 10%though the floor heater ducts. To defrost the windshield, slide the to temperature control lever the f a r right, press the (@ button, and adjust the fan to the highest speed. For rapid defrosting, 90% of the air will be directed to the windshield and side window vents. *A