Buick 2001 Century Owner's Manual page 149

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BI LEV: This setting brings in outside air and
directs it two ways. Half of the air is directed through
the instrument panel outlets. Most of the remaining air is
directed through the floor ducts and a little to the defrost
and side window vents.
HTR: This setting sends most of the air through the
ducts near the floor. The rest comes out of the defroster
and side window vents.
BLEND: This setting allows half of the air to go to
the floor ducts and half to the defroster and side
window vents. The air conditioning compressor will
run automatically in this setting unless the outside
temperature is below 40 _ F (4 _ C). (Even when the
compressor is running, you can control the temperature.)
DEF: This setting directs most of the air through
the defroster and side window vents. Some of the air
goes to the floor ducts and the side window vents.
The air conditioning compressor will run automatically
in this setting unless the outside temperature is below
40 _ F (4 _ C). (Even when the compressor is running,
you can control the temperature.)
A/C: Press this button to turn the air conditioning
on and off. The system will cool and dehumidify the
air inside the vehicle when the A/C light is on.
Heating
On cold days, use HTR with the driver and passenger
levers all the way in the red area. This system will bring
in outside air, heat it, and send it to the floor ducts.
Heating (Engine Coolant Heater)
If your vehicle has an engine coolant heater, you can use
it to help your system provide warm air faster when it's
0 _ F ( 18 _ C) or lower. An engine
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cold outside
coolant heater warms the coolant your engine and
heating system use to provide heat. See "Engine Coolant
Heater" in the Index.
Air Conditioning
On very hot days, open the windows long enough
to let hot, inside air escape. This reduces the time for
the vehicle to cool down.
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For a quick cool down on very hot days, use MAX
with the temperature levers all the way in the blue area.
If this setting is used for long periods of time, the air in
your vehicle may become too dry.
For normal cooling on hot days, use VENT with the
temperature levers in the blue area. The system will
bring in outside air and cool it.
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