Buick PARKAVENUE 1994 Manual page 140

Defog
Defrost
When the outside
temperature is mild, use
DEFOG to keep fog off the
I
windshield.
Air entering the vehicle will be evenly split between the
floor outlets and the outlets near the windshield.
The blower speed will be controlled automatically, or
you can choose another fan speed by pushing the HI or
LO buttons.
This setting directs most of
the air flow toward the
windshield. Use DEFROST
when there is fog or ice on
the windshield.
Defrost will work better if any ice and snow is cleared
from the hood and the air inlet area between the hood
and the windshield.
Blower speed will be controlled automatically, but you
can choose another speed by pushing the HI or LO
buttons.
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