Pontiac 2000 Bonneville Owner's Manual page 163

Mode Buttons
You may choose the direction of air delivery by
selecting one of the five mode control buttons.
PANEL: This setting directs airflow through the
upper air outlets located in the instrument panel.
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BI LEVEL: This setting directs airflow through
both the upper air outlets and the lower floor outlets.
There is also a small amount of air directed to the front
defroster and the side window defrosters.
FLOOR: This setting directs most of the airflow
to the lower floor outlets with some airflow directed to
the side window defrosters. There is also a small amount
of airflow directed to the front defroster.
DEFOG: This setting directs most of the airflow
to the lower floor outlets and the front windshield
defroster. A small amount of airflow is directed to the
side window defroster outlets. This mode can be useful
to remove the moisture from the inside of the windshield
when the outside temperature is cold or the humidity
is high.
FRONT: This setting directs most of the airflow
to the front windshield defroster with some airflow to
the side window defrosters and lower floor outlets.
To improve windshield clearing performance when you
select FRONT defrost, your air conditioning compressor
will run automatically above approximately 40 _ F (4 _ C).
This dehumidifies the air to help dry the windshield.
Even though the compressor may be running, the A/C
light will not come on in FRONT defrost unless you
select A/C.
Recirc Button
RECIRC: Press this button to limit the amount
of outside air entering your vehicle. This is helpful when
you are trying to quickly cool the interior of the vehicle
or to limit odors entering the vehicle. RECIRC may be
selected in all manual airflow modes except FRONT
defrost. If you select RECIRC while in defrost, the
RECIRC light will flash to let you know that this is
not allowed. This is to help prevent fogging.
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