Chevrolet 2000 Blazer Owner's Manual page 162

With the automatic setting, 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 the floor
outlets. As the interior temperature approaches a desired
setting, the blower speed will decrease. To maintain
interior comfort, the airflow will adjust between the
instrument panel air outlets and floor outlets. On bright
sunny days in cool weather, the airflow may come out of
the air conditioning and floor outlets (bi
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 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 your vehicle is sitting out on a warm day and you
have the fan set on AUTO, the air will first flow out of
the floor air outlets for a few seconds. That is normal.
This is to expel hot air from the air outlets. As the air is
cooled, the airflow will move through the air
conditioning outlets.
Be careful not to put anything over the solar sensor
located around the center of the instrument panel.
This sensor is used by the automatic system to
regulate temperature.
Mode Knob
The right knob on the control panel allows you to
choose the direction of air delivery.
You can choose to set the climate control system
-
level mode) to
operations yourself, or let the system work for you by
placing the system in AUTO mode. See "Mode Knob
Automatic Operation" earlier in this section.
through the instrument panel outlets and a small amount
through the floor outlets.
floor outlets as well as the instrument panel outlets.
warmed air through the heater floor outlets and some air
through the windshield defroster outlets.
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Manual Operation
PANEL: This setting directs most of the air
-
BI LEVEL: Air is delivered through the heater
HEATER: This setting directs most of the
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