Cadillac ESCALADE EXT 2002 Manual page 197

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Mode Knobs Automatic Operation
When the system is set in AUTO mode, sensors will
control the air delivery mode. Air will come primarily
from the floor or instrument panel outlets, with some
air directed to the windshield to prevent fogging.
When the system is in AUTO, the air conditioning light
will turn on, and the recirculation and outside air lights
will turn off. With the system in full automatic control
(both the fan and mode knobs in AUTO), you still
have the ability to override any function. However,
continually overriding the outside air or the air
conditioning compressor will limit the ability of the
system to cool the vehicle quickly.
If you press a button for a function which is not available,
the light next to that button will flash three times to alert
you that it's not available.
To find your comfort zone, start with the 74 _ F (23 _ C)
setting and allow about 20 minutes for the system to
adjust the temperature. Then set the temperature higher
or lower if necessary. The system will maintain the set
temperature.
With the automatic mode, the air conditioning compressor
automatically cycles when needed to cool the air. In cold
weather, when the system senses the need for heat, the
airflow will be directed out of the floor outlets. As the
interior temperature approaches a desired setting, the fan
speed will decrease. To maintain interior comfort, the
airflow will adjust between the instrument panel outlets
and floor outlets. On bright sunny days in cool weather,
the airflow may come out of the instrument panel and the
floor outlets to maintain comfort and prevent stuffiness.
To avoid blowing cold air 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 fan speed
will gradually increase and air will flow from the floor
outlets, with some airflow to the windshield to prevent
fogging under most normal conditions.
Be careful not to put anything over the solar sensor
located near the center of the instrument panel.
This sensor is used by the automatic system to
regulate temperature.
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