Pontiac G6 2009 Owner's Manual page 149

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(Defog): This mode clears the windows of fog
or moisture. Air is directed to the windshield and floor
outlets, with some air directed to the side windows. When
this mode is selected, the system automatically turns off
recirculation and tuns the air conditioning compressor
unless the outside temperature is at or below freezing.
The air conditioning compressor operates although the
indicator light is not on. The air conditioning indicator light
turns off when defog is selected. If the air conditioning
button is pressed while in defog mode, the indicator light
turns on. If the button is pressed again, the light turns off.
The recirculation mode cannot be selected while in the
defog mode. Do not drive the vehicle until all the windows
are clear.
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(Defrost): This mode clears the windshield of fog
or frost more quickly. Air is directed to the windshield,
with some air directed to the floor vents. In this mode,
the system automatically forces outside air into the
vehicle. The air conditioning compressor runs unless
the outside temperature is at or below freezing.
The air conditioning compressor operates although the
indicator light is not on. The air conditioning indicator light
turns off when defrost is selected. If the air conditioning
button is pressed while in defrost mode, the indicator
light turns on. If the button is pressed again, the light
turns off. Recirculation cannot be selected while in the
defrost mode.
To help clear the windshield quickly, do the following:
1. Select the defrost mode.
2. Select the highest temperature.
3. Select the highest fan speed.
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(Outside Air): Press the right side of the button to
turn the outside air mode on. An indicator light comes
on to show that it is on. Air from outside the vehicle
circulates throughout the vehicle. The outside air mode
can be used with all modes, except the recirculation
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mode. Press again to cancel the recirculation mode.
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