Buick 2001 Century Owner's Manual page 150

On cool, but sunny days, the sun may warm your upper
body, but your lower body may not be warm enough.
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You can use BI LEV and set the temperature levers to a
comfortable setting. The system will bring in outside air
and direct it to your upper body, while sending slightly
warmed air to your lower body. You may notice this
temperature difference more at some times than others.
Push the A/C button on for cooling.
Dual Automatic ComforTemp t Climate
Control (If Equipped)
With this system, you set a temperature. You can
then either let the system automatically control airflow
direction and force to maintain the temperature, or you
can manually adjust it. The system works best if you
keep your windows closed while using it.
3-4
Automatic Control
For the most efficient operation, you should set the
system temperature and press AUTO. The system will
select the best fan speed and airflow settings to keep
you comfortable. The air conditioning compressor will
run if the outside temperature is above 40 _ F (4 _ C).
You may notice a delay of two to three minutes before
the fan comes on at start up in cool weather.
Temperature Control
The TEMP switch sets the temperature for the entire
system when the light on the DUAL button isn't lit.
If the DUAL button light is lit, this master temperature
control sets the temperature for the driver only. Press the
up arrow to raise the temperature and press the down
arrow to lower the temperature. The display will show
your selection for a few seconds, then the outside
temperature will be displayed. If you push the AUTO
button, the system will control the fan speed and airflow.
For the automatic system to function, the temperature
must be set between 61 _ F (16 _ C) and 89 _ F (31 _ C).
The driver's temperature and passenger's temperature
settings will be automatically maintained even if manual
overrides have been selected except for settings at
60 _ F (15 _ C) and 90 _ F (32 _ C).