Buick 2003 Century Owner's Manual page 132

Sensors
The solar sensor on your vehicle monitors the solar
radiation and the air inside of your vehicle, then uses the
information to maintain the selected temperature by
initiating needed adjustments to the temperature, the fan
speed and the air delivery system. The system may
also supply cooler air to the side of the vehicle facing the
sun. The recirculation mode will also be activated, as
necessary. Do not cover the solar sensor located in the
center of the instrument panel, near the windshield,
or the system will not work properly.
Passenger Control
The arrow buttons to control the temperature on the
passenger side of the vehicle are located to the right of
the PASSENGER CONTROL window. Press the DUAL
button so that the indicator light is on. Press the right
arrow to raise the temperature and press the left arrow to
lower the temperature on the passenger side of the
vehicle.
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e
If the indicator lights below the arrows are amber this
indicates that the passenger side temperature is the
same as the driver's side.
If the indicator lights below the arrows are red, this
indicates that the passenger side temperature is
warmer than that of the driver's side.
If the indicator lights below the arrows are blue this
indicates that the passenger side temperature is
cooler than that of the driver's side.
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