Buick 2001 Regal Owner's Manual page 154

MAX: This setting recirculates much of the air inside
your vehicle and sends it through the instrument panel
outlets. 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.)
VENT: This setting brings in outside air and directs it
through the instrument panel outlets.
-
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 coolant
-- -
cold outside
heater warms the coolant your engine and heating
system use to provide heat. See "Engine Coolant
Heater" in the Index.
3-3