Porsche Boxster Owner's Manual page 158

Note
If the preselected temperature is changed, the
blower speed can increase automatically in
automatic mode. The desired temperature is
reached more quickly this way.
Sensors
To avoid affecting the performance of the air-condi-
tioning system:
Do not cover the sun sensor on the instrument
panel or the temperature sensor D.
Defrosting the windshield
Press button B (switch on or off). The wind-
shield is demisted or defrosted as quickly as
possible. Air flows to the windshield only. The
light-emitting diode in the button lights up.
ECO - switching compressor for
air-conditioning system on and off
The air conditioning compressor switches off
automatically at temperatures below approx.
37°F /3°C and cannot be switched on, even
manually.
Whenever outside temperatures exceed approx.
37°F /3°C , the air-conditioning compressor is
always switched on in automatic mode.
The compressor can be switched off manually to
save fuel, but control comfort is then limited:
156
Controls, Instruments
Press ECO button E. The compressor is
switched off. The light-emitting diode in the
button lights up.
If the interior temperature is too high, switch
compressor back on or press AUTO button.
To dry incoming air in damp weather, do not switch
off the air-conditioning compressor. This prevents
misting of windows.
Adjusting blower speed
Press button M upwards or downwards
respectively. The preset blower speed is
increased or decreased.
The speed stages are indicated by a bar display.
The compressor is switched off at low blower
speeds.
If the button is pressed downwards at the lowest
blower stage, the blower and automatic control are
switched off. "OFF" will appear on the display field.
Pressing the button upwards or pressing the AUTO
button switches the blower and automatic control
back on again.
Recirculating-air setting
Function
The outside-air supply is interrupted and only the
inside air is circulated.
Warning!
Risk of accident due to impaired vision,
resulting in serious personal injury or death.
In recirculating-air setting, the windows may
fog up.
Only select recirculating-air setting for short
periods.
If the windows fog up, switch recirculating-air
setting off immediately by pressing the
recirculating-air button again and select the
"Defrost windshield" function.
Switching recirculating-air setting on or off
Press button C. The light-emitting diode in the
button lights up.
Over approx. 37°F/3°C
If the air-conditioning compressor was off, it
switches on automatically. The duration of
recirculating-air setting is not limited.