Chevrolet 1998 Lumina Owner's Manual page 143

Ventilation Tips
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For mild outside temperatures when little heating or
cooling is needed, use VENT to direct outside air
through your vehicle.
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Keep the hood and front air inlet free of ice, snow or
any other obstruction, such as leaves. The heater and
defroster will work far better, reducing the chance of
fogging the inside of your windows.
mode to FLOOR and the fan to the highest speed for
a few moments before driving off. This helps clear
the intake ducts of snow and moisture and reduces
the chance of fogging the inside of your windows.
objects. This helps a i r to circulate throughout
your vehicle.
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When you enter a vehicle in cold weather, set the
Keep the air path under the front seats clear of
Defogging and Defrosting
Your system has two settings for clearing the front and
side windows. To defrost the windows quickly, use
DEFROST with the temperature knob(s) all the way in
the red area. To warm passengers while keeping the
windows clean, use DEFOG.
Rear Window Defogger
The rear window defogger
uses a warming grid to
remove fog from the rear
window. Press the knob to
turn the defogger on.
It will turn itself off after about 10 minutes. If you turn
it on again, the defogger will only run for about five
minutes before turning off. You can also turn it off by
turning off the ignition or pressing the button again.
Do not attach anything like a temporary vehicle license
or decal across the defogger grid.
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