Chevrolet 1997 Corvette Owner's Manual page 159

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Heating
The heater works best if you keep your windows closed.
Maximum heating will occur when airflow direction
is in the lower mode and the temperature control knob
(on a manual climate control system) is all the way in
the red area. These settings will be selected by the
Automatic Electronic Dual Climate Control System if
operating in AUTO when maximum heating is required.
The BI-LEVEL setting is designed for use on sunny
days when the air is only moderately warm or cool.
On days like these, the sun may adequately warm
your upper body, but your lower body may not be
warm enough. The BI-LEVEL setting will direct
cooler airflow to your upper body and warmer air
to the floor area.
If you have the optional engine coolant heater and use
it during cold weather 0°F
(-
18OC) or lower, your
heating system will provide heat more quickly because
the coolant is already warmed. See "Engine Coolant
Heater" in the Index.
Defogging and Defrosting
To rapidly defrost the windshield, the FRONT defrost
mode (electronic dual climate control system) or defrost
mode (manual control system) should be used and the
fan speed should be adjusted to the highest speed. With
the manual control system,
turn
the temperature control
knob all the way to the red area.
To keep the windshield clear and provide heated air to
the floor area of the vehicle, use the DEFOG setting.
Your vehicle is equipped with side window defogger
vents located near the side rearview mirrors.
3-12

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