Buick 2004 Century - Manual (Page 122)

Defogging and Defrosting
Fog on the inside of the windows is a result of high
humidity causing moisture to form and condense on
the cool window glass. This can be minimized if
the climate control system is used properly. There are
two modes to clear fog or frost from the windshield
and side windows. Use the blend mode to clear
the windows of fog or moisture and warm the
passengers. Use the defrost mode to remove frost or
fog from the windshield more quickly. For best results,
clear all snow and ice from the windshield before
defrosting.
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DEF (Defrost): This setting, located on the right
knob, directs most of the air through the defroster
and the side window outlets. Some of the air is directed
to the floor and side window outlets. The air-conditioning
compressor will run automatically in this setting unless
the outside temperature is below 40°F (4°C).
To defrost the window quickly, turn the mode knob to
the defrost setting and turn the driver’s and passenger’s
temperature levers all the way to the red area.
To warm passengers while keeping the windows clear,
use BLEND.
Do not drive the vehicle until all the windows are clear.
Rear Window Defogger
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(Rear): Press the button to turn the defogger on or
off. The rear window defogger will initially run for
about 15 minutes. If it is turned on again, the rear
window defogger will only run for about seven and one
half minutes before turning off.
Do not drive the vehicle until all the windows are clear.
Notice: Using a razor blade or sharp object to
clear the inside rear window may damage the rear
window defogger. Repairs would not be covered
by your warranty. Do not clear the inside of the rear
window with sharp objects.
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