Opel Astra Owner's Manual page 164

160 Climate control
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Air flow
Adjust with right rotary switch.
1 - 4 Manual fan speed setting.
Intermediate settings are possible.
A Automatic fan speed setting.
x Fan switched off.
Fan speed is regulated to provide the rate
of air flow necessary to maintain the pre-
selected temperature.
Select automatic mode for the highest level
of comfort.
When the fan is off, the air conditioning
compressor is also off.
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To activate/deactivate air conditioning
compressor (cooling) n
Only operate with the engine and fan
running. Activate or deactivate with
the n button.
When cooling (AC compressor) is active,
air is cooled and dehumidified. If cooling
or dehumidification is not desired, switch
off cooling in order to save fuel.
Cooling switches off automatically at low
outside temperatures.
When cooling is on condensation forms,
which is expelled from the underside of
the vehicle.
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Manual air recirculation mode
The air recirculation system prevents
the entry of outside air and the air in the
passenger compartment is circulated.
The air recirculation system is activated
or deactivated with the 4 button.
Warning
9
The air recirculation system minimises
the entry of outside air. If operated
without cooling, humidity increases
and the windows can mist up. The
quality of the passenger compartment
air deteriorates which may cause the
vehicle occupants to feel drowsy.