Buick 2002 LeSabre Owner's Manual page 162

OFF: If the passenger comfort control is turned on, it
can be turned off by pressing the OFF button once.
Pressing the OFF button a second time will turn off the
main system. Turning off the main system causes the fan
to turn off and the airflow to be directed toward the
floor. The system will still try to keep the interior of the
vehicle at the previously chosen temperature setting.
The outside temperature will show on the display when
the system is off.
The ventilation system always allows fresh air to flow
through your vehicle when the vehicle is moving even
when the system is off.
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VENT (Flow Through Ventilation): The VENT
button allows outside air to flow through your vehicle
without the air conditioning compressor working. To
turn off the VENT selection, push the VENT button
again. If you select VENT while in FRONT defrost, the
VENT light will flash three times to let you know this is
not allowed. This is to prevent fogging.
RECIRC (Recirculation): When RECIRC is selected,
the system will limit the amount of outside air entering
your vehicle. This is helpful when you are trying to cool
the interior of the vehicle quickly or limit the amount of
outside air entering your vehicle. RECIRC and AUTO
may be selected at the same time. The system will remain
in RECIRC until the ignition is turned off or the RECIRC
button is pressed again. RECIRC can be selected in all
manual airflow modes except FRONT defrost and VENT.
If you select RECIRC while in FRONT defrost, the
RECIRC light will flash three times to let you know this is
not allowed. This is to prevent fogging.
FRONT: This selection is used to defrost
the windshield by directing the airflow toward the
windshield. To turn off FRONT, press the AUTO
or AIR FLOW button.
If the AIR FLOW up button is selected while in the
FRONT defrost mode, the system will direct the air
toward the windshield and the floor. If the AIR FLOW
down button is selected while in the FRONT defrost
mode, the system will direct the air toward the floor, and
the FRONT defrost mode will cancel.
FRONT defrost will work better if any ice or snow is
cleared from the hood and the air inlet area between the
base of the windshield and the hood.
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