Defogging And Defrosting - Pontiac 2004 Grand Prix Owner's Manual

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(Floor): This mode directs most of the air to the floor
outlets with some air directed toward the side window
outlets and a little air directed to the windshield.
In this mode, the system will automatically use outside
air. The air conditioning compressor will be engaged
unless the outside temperature is 40° F (4°C) or below.
Recirculation cannot be selected when in this mode.
The middle knob on the climate control panel can also
be used to select the defog or defrost mode.

Defogging and Defrosting

Fog on the inside of the vehicle is a result of high
humidity (moisture) condensing 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. Use the defrost mode to remove
frost or condensation from the windshield quickly.
See "Rear Window Defogger" later in this section for
information on clearing the rear window of fog or ice.
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There are two modes to clear fog from your windshield.
Recirculation cannot be selected when in these modes.
.
(Floor/Defog): Use the floor/defog mode to clear the
windows of fog or moisture and warm the passengers.
This mode directs the air equally between the
windshield and the floor outlets, along with some
directed to the side window outlets.
This mode will automatically use outside air. The air
conditioning compressor will be engaged unless
the outside temperature is 40° F (4°C) or below.
1
FRONT (Defrost): Use the front/defrost mode to
remove fog or frost from the windshield more quickly.
This mode directs most of the air to the windshield and
the side window outlets, with some air directed to
the floor outlets. This mode has a timer and will shut off
after five minutes.
This mode will automatically use outside air. The air
conditioning compressor will be engaged unless
the outside temperature is 40° F (4°C) or below.