Defogging And Defrosting - Buick 2006 LaCrosse Owner's Manual

On hot days during the vehicle's initial start-up, open
the windows to let hot inside air escape; then close
them. This helps to reduce the time it takes for
the vehicle to cool down. It also helps the system to
operate more efficiently.
For quicker cool down on hot days, do the following:
1. Select the vent air mode.
2. Select the recirculation mode.
3. Select the air conditioner.
4. Select the coolest temperature.
5. Select the highest fan speed.
The air-conditioning system removes moisture from the
air, so you may sometimes notice a small amount of
water dripping underneath your vehicle while idling
or after turning off the engine. This is normal.

Defogging and Defrosting

Fog on the inside of the vehicle is a result of high
humidity causing moisture to condense on the
cool window glass. This can be minimized if the
climate control system is used properly. There are
two modes to clear frost or fog from the windshield.
Use the defog mode to clear the windows of
condensation and to warm the vehicle's occupants.
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Use the defrost mode to remove frost or condensation
from the windshield quickly. Recirculation cannot be
selected when in these modes (the indicator light
will come on when pressed).
See "Rear Window Defogger" later in this section for
information on clearing the rear window of fog or ice.
Turn the right knob to select the defog or defrost mode.
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(Defog): This mode directs half of the air to the
windshield and the side window outlets and half to the
floor outlets. When you select this mode, the system
turns recirculation off and runs the air conditioning
compressor unless the outside temperature is near
or below freezing. Pressing the recirculation button will
have no effect other than turning on the indicator
light while in defog mode.
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(Defrost): This mode directs most of the air to the
windshield and the side window outlets, with some
air directed to the floor outlets. When you select this
mode, the system turns recirculation off and runs the air
conditioning compressor unless the outside temperature
is near or below freezing. Pressing the recirculation
button will have no effect other than turning on
the indicator light while in defrost mode.