Air Conditioning - Buick 1999 Riviera Owner's Manual

FRONT: This selection is used to defrost
the windshield by directing the airflow toward
the windshield.
If FRONT is selected while in the AUTO mode, the
fan speed and the air temperature from the front
defroster will vary. If a manual fan speed setting is
selected, the fan speed will remain at that selection until
another fan speed selection is made or the AUTO mode
is selected. To turn off FRONT, press the AUTO or
AIR FLOW button.
FRONT defrost will work better if any ice or snow is
cleared from the hood and the air inlet area between the
base of the windshield and the hood.

Air Conditioning

On very hot days, open the windows long enough to let
the hot air out. This reduces the time required to cool the
interior of the vehicle to a comfortable level. If the
system is in the AUTO mode on very hot days, the
system will automatically enter the RECIRC mode and
the temperature door will be positioned at the full cold
position for maximum cooling. If the system is not in
the AUTO mode, RECIRC should be selected to provide
maximum cooling. You can choose the extreme comfort
setting of 60 _ F (16 _ C), but the system will not cool any
faster by choosing the extreme comfort setting.
Heating
On cold days, if the AUTO mode is selected, the system
will automatically direct the air toward the floor and the
temperature door will be positioned at the full hot
position. You can choose the extreme comfort setting of
90 _ F (32 _ C) but the system will not warm up any faster
by selecting the extreme comfort setting. If the outside
temperature is cold, the fan will be delayed to avoid
blowing cold air. Pushing the FAN, AIR FLOW or
FRONT buttons will override this delay, turn off the
AUTO mode and change the fan speed.
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