Cadillac 1995 DeVille Owners Literature page 173

Electronic Climate Control Features
A/C Purge
If your vehicle is sitting out on a hot day and you have it set on AUTO,
the air will first flow
o u t
the floor air ducts for a few seconds. That is
normal. This is to expel hot air in
the air ducts. As the air
is
cooled. the
flow will move through the A/C outlets. If you start your vehicle with the
fan setting on H I it will skip the
A/C
Purge.
Cold Weather Purge
On cold days when your system is first turned on, in either the AUTO or
ECON setting? and the fan setting
is
not on HI,
a small
amount o f air will
flow through thc defroster duct whilc the system is waiting for the engine
coolant to warm up enough to provide hcat. This prevents your breath
from
fogging your windshield. As the coolant warm up, the blower fan
specd will gradually
increase and
air will flow from the heater outlets,
with
some airflow to the windshield to prevent fogging under most normal
conditions.
Manually Recirculate Inside Air
u
There m a y be times whcn vou
want less air from the outside. To
recirculate the air from t h i inside, in the AUTO setting, just set the
temperature to 60" F (16* C) and adjust your fan speed:
DEFOG
Press this button t o divide the air between the windshield and the heater
ducts.
This is useful when fog appears on the windshield or side glass due
to sudden rain or snowy conditions.
Fan Speeds
/+ Press the fan
symbol
button until AUTO is
displayed on the
screen.
At this setting, the fan speed is controlled automatically.
If it is cold outside, the blower may not run in
the maximum high fan
speed right away. The system checks the temperature of the coolant to
assure it is warm enough
t o
provide heat. When thc coolant is warnl, the