Buick 2005 Century Owner's Manual page 122

3. Wait for the system to regulate. This may take from
10 to 30 minutes. Then, adjust the temperature,
if necessary.
Do not cover the solar sensor located in the center
of the instrument panel, near the windshield.
For more information on the solar sensor, see "Solar
Sensor" later in this section.
Manual Operation
During daylight hours, the instrument panel brightness
control might need to be adjusted to the highest setting,
in order to see the indicator lights for the various
climate control settings.
OFF: Pressing the OFF button cancels automatic
operation and places the system in manual mode.
Press the AUTO button to return to automatic operation.
TEMP (Temperature): To manually adjust the
temperature inside the vehicle, press the up arrow on
the TEMP control to raise the temperature and press the
down arrow to lower the temperature. The display will
show the selection for a few seconds, and then the
outside temperature will be displayed.
When the DUAL light indicator is on, this means the
TEMP control has set the temperature for the driver.
When the DUAL light indicator light is not on, this means
the TEMP control has set the temperature for the
entire cabin.
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FAN: Press the up arrow on the FAN control to
increase fan speed and the down arrow to decrease
fan speed. Pressing the arrows cancels the automatic
operation and places the system in manual mode.
Press the AUTO button to return to automatic operation.
If the airflow seems low when the fan is at the highest
setting, the passenger compartment air filter may
need to be replaced. For more information see
Passenger Compartment Air Filter on page 3-26 and
Scheduled Maintenance on page 6-4.
AIR FLOW: This control has several settings to control
the direction of airflow when the system is not in AUTO.
To access the various modes available, continue to press
the AIR FLOW up or down arrows until the desired mode,
listed below, appears in the display.
WINDSHIELD/FLOOR: This setting directs some of the
air to the floor outlets and some to the defroster and
side window outlets. The air-conditioning compressor will
run automatically in this setting unless the outside
temperature is below 40°F (4°C).
MID/FLOOR: This mode directs airflow through both
the floor and the instrument panel outlets. A small
amount of air is directed to the windshield and the side
window outlets.