Chevrolet avalanche 2002 用户手册

Recirculation will not be available in floor, blend, or
defrost modes to help reduce window fogging. If the
recirculation button is pressed in these modes, the 
LED indicator for recirculation will flash three times
indicating that forced outside is activated and
recirculation is not available.

If the air conditioning system is activated and system
demand is high in situations such as city traffic, idling,
or very hot weather, the system will automatically
switch from outside air to recirculation. The LED
indicator will not change. After demand on the system is
not so great, the system will return to outside air.

A/C (Air Conditioning): This button is used to

control the air conditioning compressor. Turning the
system on will allow air to be cooled and dehumidified
inside the vehicle.

Air conditioning will be automatically disabled when
the outside air temperature drops below a level at 
which air conditioning is effective.

(Fan): The knob on the left side of the electronic

climate control panel regulates the fan speed. To manually
increase airflow, move the knob clockwise. To manually
decrease airflow, move it counterclockwise.

OFF: If the knob is in OFF, outside air will still enter
the vehicle, and will be directed based on the position of
the mode knob.