External Temperature Display
WARNING: This page is about a different car, the 2005 Mercury Mountaineer and 2005 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.
When the ignition is first turned to ON, the external temperature displayed will be the last temperature read before the ignition was turned OFF. If the last temperature read is below 6°C (43°F), the DATC module will prevent A/C operation.
The external temperature display will update when the vehicle has been driven above 40 kph (25 mph) for greater than 30 seconds. Once the DATC module updates the external temperature, the DATC module will allow normal A/C operation.