Buick 2000 Park Avenue Owner's Manual page 164

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 to the floor.
The system will still try to keep the interior of the
vehicle at the previous chosen comfort 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
with the system in the OFF mode.
VENT: The VENT button allows outside air to flow
through your vehicle without the air conditioning
compressor working. Selecting the VENT and the
AUTO buttons at the same time allows the system to
control the air flow automatically without the use of the
air conditioning compressor or the use of the RECIRC
mode. To turn off the VENT selection, push the VENT
button again.
RECIRC: 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 for some other reason. RECIRC
and AUTO may be selected at the same time. The
system will remain in RECIRC until the ignition is
turned off. The system will return back to the previously
selected mode when the car is turned back on. RECIRC
can be selected in all manual airflow modes except
FRONT defrost. RECIRC cannot be selected with the
VENT button.
FRONT: This selection is used to defrost
the windshield by directing the airflow toward
the windshield.
If FRONT is selected while in the AUTO mode,
the fan speed and the air temperature from the front
defroster will vary. If a manual fan speed setting is
selected, the fan speed will remain at that selection until
another fan speed selection is made or the AUTO mode
is selected. To turn off FRONT, press the AUTO or
AIR FLOW button.
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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