Oldsmobile Bravada 2002 Owner's Manual page 168

Automatic Operation
Press the AUTO button to set the system to automatically
control the air delivery mode, fan speed, air temperature
and recirculation operations. Whenever you press
AUTO, the display will change to show the current
driver's set temperature, automatic air delivery mode
and fan speed. Press the AUTO button again within
five seconds and the display will show the passenger's
set temperature. After five seconds the display will
change to the EXT (external) temperature outside
the vehicle.
When AUTO is selected, the air conditioning operation
and air inlet will be automatically controlled. The air
conditioning compressor will run when outside
temperature is over approximately 40 _ F (4 _ C).
The air inlet will normally be set to outside air. If it's
hot outside, the air inlet will automatically switch to
recirculated inside air to help quickly cool down
your vehicle.
To find your comfort setting, start with a 74 _ F (23 _ C)
temperature setting and allow about 20 minutes for the
system to regulate. Turn the driver's or passenger's
side temperature knob clockwise or counterclockwise
to adjust the temperature setting as necessary. If you
choose the temperature setting of 60 _ F (15 _ C),
the system will remain at the maximum cooling setting
3-4
and fan speed. If you choose the temperature setting
of 90 _ F (32 _ C), the system will remain at the
maximum heat setting and fan speed. Choosing either
maximum setting will not cause the system to heat or
cool any faster.
Be careful not to cover the sensor located on the top of
the instrument panel near the windshield. This sensor
regulates air temperature based on sun load, and also
turns on your headlamps.
The EXT (exterior) temperature sensor is located in the
front of the vehicle behind the grille. The displayed
temperature is most accurate after the vehicle has been
moving for a few minutes. If the vehicle is stopped and
then restarted within 2 1/2 hours, the sensor will be hot
from the engine heat. In this case, the temperature first
displayed will continue to be the temperature that was
displayed before the vehicle was turned off. The display
will update after the vehicle has been moving for a few
minutes and the sensor has a chance to cool down to
the actual temperature.
To avoid blowing cold air in cold weather, the system
will delay turning on the fan until warm air is available.
The length of delay depends on engine coolant
temperature. Pressing the fan switch will override
this delay and change the fan to a selected speed.