Saab 2006 9-5 Owner's Manual page 84

84 Instruments and controls
Panel (and centre rear vent)
Starting in cold weather
To start with, the system will automatically select the defroster set-
ting, maximum heat and low fan speed.
As the engine warms up, air will also be distributed through the floor
vents and the fan speed will be increased.
As the temperature inside the car nears the selected value, both the
fan speed and the heat will be decreased to a level determined by
the system.
Starting in hot weather
The system will automatically distribute air through the panel vents
at high fan speed and will switch on the A/C compressor (unless the
AC OFF switch has been pressed).
If the outdoor temperature is above 77°F (25°C), the system might
select recirculation after 0-15 seconds if this is required in order to
reach the desired temperature.
As the temperature inside the car nears the selected value, the fan
speed will be decreased to a value determined by the system.