Cadillac 1995 DeVille Owners Literature page 174

c
L
controller allows the Can
to
gradually incrcase to a higher speed. This
prevcnts cold air from blowing into the passenger compartment.
If
\ / o u
want the
blowcr
fan to run only at
a
k e d high speed, press the
(upper) button
until
you sce HI on the display.
If you want the fan speed t o be automatic, but vou like the fan speed
to
be
higher than the AUTO setting. just press the fan button until HI/AUTO is
shown on thc display.
I f you
w a n t
the blowcr
t o
~ L I I I
only a t a fixed l o w speed, press the (lower)
huttot1 until
LO is shown on the display.
Press this button to
removc fog or frost
from
the windshield.
This setting sends most o f the airflow t o the windshield w i t h only a small
amount to the floor outlets.
The fan speed will work automatically
t o
maintain vour
rsqussted interior
temperature. If you need more air directed to yourbindshield, you should
select
a
higher fan speed.
in some cold start conditions, the AUTO blower fan speed may be limited
until the engine cooling system warms up. This is normal to prevent
windshield fogging.
It will help if you first clear any ice and snow from the hood and the air
inlet (it's between the hood and the windshield).