Cadillac 1996 Eldorado Owner's Manual page 154

To avoid blowing cold a i r in cold weather, the system will
delay turning on the fan until warm air is available. The
length
of
delay depends on the outside air temperature,
engine coolant temperature or the time since the engine
was last started. As the coolant warms up, the blower fan
speed will gradually increase and air will flow from the
heater outlets, with some airflow to the windshield to
prevent fogging under most normal conditions.
If you leave your vehicle, the system will remember the
control setting the next time you start your engine,
except for recirculation and defrost. Each ignition cycle
cancels recirculation, whereas, DEmROST will change
to
AUTO when the ignition is shut off and then turned
back on.
You may manually adjust the air delivery mode or fan
speed.
/ . I
A/C: This setting directs airflow through the
A @
middle instrument panel outlets.
A @
BI-LEVEL: This setting directs air into your
vehicle in two ways. Cool air is directed to the upper
portion
of
your body through the middle instrument
panel outlets while warmed air is directed to the floor.
'fl
HEATER/DEFROST: This setting directs air to
the floor outlets and toward the windshield.
w .
0
v H
HEATER: This setting directs warmed air
through the floor outlets. Some warm air is diverted to
the windshield to minimize fogging.
DEFROST Press this button to quickly remove
fog or frost from the windshield. This setting sends most
of the airflow to the windshield with only a small
amount to the floor outlets.
@ DE-ICE (Option): Pressing this button helps to
remove ice or frost from the windshield. See "Heated
Windshield" later in this section.
DEFOG: Press this button to divide the air between the
windshield and the heater outlets. This is useful when
fog appears on the windshield or side glass due to
sudden rain or snowy conditions. This feature is not
available with the heated windshield option.