Pontiac 2003 Bonneville Owner's Manual page 141

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A/C (Air Conditioning): Press this button to turn
the air conditioning compressor on and off. When A/C is
pressed, an indicator light in the button will come on
to let you know that air conditioning is activated. If your
climate control system is off, you may also turn it
back on in vent mode by selecting the
A/C
button.
On hot days, open the windows to let hot inside
air escape; then close them. This helps to reduce the
time it takes for your vehicle to cool down. It also helps
the system to operate more efficiently.
For quick cool down on hot days, do the following:
1. Select the vent mode.
2. Select the recirculation mode.
3. Select N C .
4. Select the coolest temperature.
5. Select the highest fan speed.
Using these settings together for long periods of time
may cause the air inside of your vehicle to become too
dry. To prevent this from happening, after the air in
your vehicle has cooled, turn the recirculation mode off.
The air conditioning system removes moisture from
the air, so you may sometimes notice a small amount of
water dripping underneath your vehicle while idling or
after turning off the engine. This is normal.
Sensors
The solar sensor on your vehicle monitors
radiation and the air inside of your vehicle,
the solar
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.
Defogging and Defrosting
There are two modes to clear fog or frost from your
windshield. Use the defog mode to clear the windows of
fog or moisture and warm the passengers. Use the
defrost mode to remove fog or frost from the windshield
more quickly.
Press one of the available mode buttons
to
select the
defog or defrost mode.
+3
(Defog): This mode directs most of the air to the
windshield and the floor outlets. A small amount of air is
also directed to the outboard outlets (for the side
windows). When you select this mode, the system turns
off recirculation and runs the air conditioning compressor
unless the outside temperature is at or below freezing.
The recirculation mode cannot be selected while in
the defog mode.
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