Buick 2006 Rendezvous Owner's Manual page 177

Temperature Control: Use the DRIVER knob to
increase or decrease the air temperature inside your
vehicle. If the front passenger would like the temperature
to be warmer or cooler, use the PASS knob to adjust
the passenger's temperature.
Air Conditioning: The air-conditioning compressor
will automatically come on when a temperature cooler
than the interior temperature is chosen using the
temperature knobs.
You may notice a slight change in engine performance
when the air-conditioning compressor shuts off and
turns on again. This is normal. The system is designed
to make adjustments to help with fuel economy while
still maintaining the selected temperature.
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.
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.
Defogging and Defrosting
Fog on the inside of windows is a result of high humidity,
or moisture, condensing on the cool window glass. This
can be minimized if the climate controls system is used
properly. 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.
Use the MODE button to select the defog mode.
-
(Defog): This mode directs air to the windshield
and the floor outlets. 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.
Press the defrost button to select defrost.
0
(Defrost): Pressing this button directs most of the
air to the windshield and the side window outlets, with
some air directed to the floor outlets. In this mode, the
system will automatically turns off recirculation and run
the air-conditioning compressor, unless the outside
temperature is at or below freezing. Recirculation
cannot be selected while in the defrost mode.
Do not drive the vehicle until all the windows are clear.
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