Sunload Sensor (Solar Radiation Sensor)
WARNING: This page is about a different car, the 2008 Mercury Sable, 2008 Ford Taurus X, and 2008 Ford Taurus. However, it is still accessible from the selected car via links, so may be relevant.
The solar radiation sensor supplies information to the HVAC module indicating sunload. The sunload sensor is located on the center of the instrument panel at the base of the windshield.