Buick 2006 LaCrosse Owner's Manual page 145

Use the right knob to select from the following modes:
H
(Vent): This mode directs outside air to the
instrument panel outlets. If driving in city traffic, and
the vehicle is stopped and idling, or the weather is hot,
turn on the recirculation mode. To prevent the air
inside the vehicle from becoming stale, after five minutes
recirculate will allow outside air into the vehicle.
)
(Bi-Level): This mode directs half of the air to
the instrument panel outlets, and the remaining air to
the floor outlets. Some air may be directed toward
the windshield. Slightly cooler air is directed to
the instrument panel outlets and warmer air is directed
to the floor outlets.
6
(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.
If recirculation is selected, the led will come on.
You can also select modes by using the following
buttons:
h
(Recirculate): Press this button to recirculate
cabin air through 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. An indicator light below the button will come on
in this mode. Operation in this mode during periods
of high humidity and cool outside temperatures
may result in increased window fogging. If window
fogging is experienced, select the defrost mode.
To prevent the air inside the vehicle from becoming
stale, after five minutes recirculate will allow outside air
into the vehicle.
#
(Air Conditioning): Press this button to turn the
air conditioning system on or off. When this button
is pressed, an indicator light below the button will come
on to let you know the air conditioning is activated.
Air conditioning can be selected in any mode as long as
the fan switch is on. Note that the indicator light will
change with each button press even when conditions
prevent operation.
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