Cadillac 1999 Eldorado Owner's Manual page 147

FAN SPEEDS: Press the button with the fan
symbol on it until AUTO is displayed on the screen. At
this setting, the fan speed is automatically controlled. 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 engine coolant to assure it is
warm enough to provide heat. When the engine coolant
is warm, the controller allows the fan to gradually
increase to a higher speed. This prevents cold air from
blowing into the passenger compartment. If you want
the blower fan at a high speed, press the up arrow button
until you see HI on the display. If you want the fan
speed to be automatic, but you like the fan speed to be
higher than the AUTO setting, press the fan symbol
button until HI AUTO is shown on the display. If you
want the blower fan at a low speed, press the down
arrow button until LO is shown on the display. If you
want the fan speed to run lower than the AUTO
setting, press the button until LO AUTO is shown
on the display.
OFF: Press this button to turn the system off. Fresh
air will continue to flow through the vehicle, and the
system will try to maintain the previously set
temperature. The outside temperature will show
on the display when the system is OFF.
AC: Press this button to turn the air conditioning on and
off. The system will cool and dehumidify the air inside
the vehicle. In the AUTO mode, the display will show
that AC is active, but the air conditioning compressor
only operates when the system determines it is needed.
RECIRCULATION: Press this button to limit the
amount of fresh air entering your vehicle. This is helpful
when you are trying to cool the air quickly or limit odors
entering your vehicle. In the AUTO mode, the system
will use recirculation as necessary to cool the air.
Pressing the recirculation button will change the
operation to a manual mode and the air will recirculate
-
non stop. Press this button again to turn off the
recirculation feature.
If you notice the windows fogging, press the
recirculation button to exit the recirculation mode.
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