Buick REGAL 1997 Manual page 163

Dual Automatic ComforTemp Climate
Control (If Equipped)
FRONT
With this system, you set a temperature. You can then
either let the system automatically control airflow
direction and force it to maintain the temperature, or you
can manually adjust it. The system works best if you
keep your windows closed while using it.
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.
Driver's Temperature Control
The TEMP switch sets the temperature for the entire
system when the light on the DUAL button isn't lit. If
the light is lit, this 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 show. If you push the
AUTO button, the system will control the fan speed
and airflow.