Aston Martin One-77 2010 Owner's Manual page 116

[8] FAN SPEED - Turn to set the required fan speed
(clockwise for fast speed and counterclockwise for low
speed). If the infotainment display is open the fan
speed is shown while an adjustment is made (goes OFF
one second after adjustment is stopped.).
Warning: Do not select recirculated air in cold
or rainy weather, it can cause the interior glass to
mist up.
[9] AIR CIRCULATION - Controls the source of air
entering the vehicle. Press to select recirculated air
(button LED ON). Press again to select outside air as
source.
Use the recirculated air position when going through
tunnels, driving in congested traffic (high engine
exhaust areas) or when maximum cooling is required.
On start up the default position is outside air as source.
Use this position for normal conditions and demisting.
6.4
Solar and Temperature Sensors
The automatic air conditioner function measures
inside and outside temperatures, and sunlight. It then
sets the interior temperature accordingly. To maintain
effective operation do not obscure the following
sensors:
[1] - Solar sensor.
[2] - In-vehicle temperature sensor.