Buick 2004 LeSabre Owner's Manual page 138

Use the up and down arrows on the AIR FLOW button
to cycle through the available modes.
•
WINDSHIELD-FLOOR: This mode directs most of
the airflow to the windshield with some airflow to
the outboard outlets (for the side windows) and the
floor outlets.
•
MID: This mode directs airflow through the
instrument panel outlets.
•
MID-FLOOR: This mode directs airflow through both
the floor and the instrument panel outlets. There is
also a small amount of air directed to the windshield
and the outboard outlets (for the side windows).
•
FLOOR: This mode directs most of the airflow to
the floor outlets with some directed to the outboard
outlets (for the side windows) and the windshield.
OFF: Press the OFF button once to turn off the
passenger climate control, if it has been activated.
Pressing the OFF button a second time will turn off the
main system. The outside temperature will be shown
on the display when the system is off.
VENT (Flow-Through Ventilation): Pressing the VENT
button allows outside air to flow through your vehicle
without the air conditioning compressor working. To turn
off the VENT selection, press the VENT button again.
Selecting the VENT and AUTO buttons at the same time
allows the system to control the airflow automatically
without using the air conditioning compressor or
the recirculation mode.
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RECIRC (Recirculation): Press this button to limit the
amount of outside air coming into the vehicle. It can be
used to prevent outside air and odors from entering your
vehicle or to help heat or cool the air inside your vehicle
more quickly. Press this button to turn the recirculation
mode on or off. When the button is pressed, an indicator
light will come on. The recirculation mode cannot be used
with the FRONT defrost or VENT mode.
On hot days, open the windows to let hot air escape; then
close them. This helps to reduce the time it takes for your
vehicle to cool down. It also helps the system to operate
more efficiently.
For quick cool down on hot days, press the AUTO button
and the system will automatically enter recirculation
mode and the temperature will be at the full cold position
for maximum cooling.
Using these settings together for long periods of time may
cause the air inside of your vehicle to become too dry. To
prevent this from happening, after the air in your vehicle
has cooled, turn the recirculation mode off.
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.