Saturn 2007 AURA Green Line Hybrid Owner's Manual page 157

On cool, but sunny days while using manual
operation of the automatic system, use bi-level to
deliver warm air to the floor and cooler air to
the instrument panel outlets. To warm or cool the
air delivered, press the temperature buttons to
the desired setting.
In AUTO mode the system cools and dehumidifies
the air inside the vehicle. Also while in AUTO
mode, the system maximizes its performance by
using recirculation as necessary.
Heating: On cold days when using manual
operation of the automatic system, use floor mode
to deliver air to the floor outlets. To warm or
cool the air delivered, push the temperature
buttons to the desired setting.
To use the automatic mode, turn the knob to
AUTO and adjust the temperature by pressing the
temperature buttons.
When the heater is in use, there might be slight
noise or vibration during Auto Stops. This is due to
the coolant circulation pump that continues to
circulate heat through the system during the
engine Auto Stop.
The heater works best if the windows are kept
closed.
h
(Recirculation): Press the button to turn on
the recirculation mode. The air inside the vehicle
recirculates through the climate control system and
the vehicle, not from outside your vehicle. This
mode is helpful when trying to limit odors
from entering the vehicle and for maximum air
conditioning performance in hot weather. When the
button is pressed, an indicator light above the
button comes on. The recirculation indicator light
blinks three times if recirculation is used in a
mode in which it cannot function. Only use this
mode when it is needed for comfort, since window
fogging rapidly occurs if the air conditioning
compressor is not engaged.
Press this button to cancel the auto recirculation
feature. Each time the vehicle is started, the
system reverts to the auto recirculation function.
If you select recirculation while in defrost, defog or
floor, the light on the button flashes three times
and then goes out to indicate that this is not
allowed. This is to prevent window fogging.
157