2006 Cadillac STS-V Owner's Manual - Page 196

Sensors Defogging and Defrosting Fog on the inside of windows is a result of high humidity (moisture) condensing on the cool window glass. This can be minimized if the climate control system is used properly. There are two modes to clear fog from your windshield. Use the defog mode to clear the windows of fog or moisture and warm the passengers. Use the defrost mode to remove fog or frost from the windshield more quickly. yN z (Mode): Press this button until defog appears on the display. - (Defog): This mode directs the air between the windshield and floor outlets with some air supplied to the outboard panel outlets and side window defogging outlets. When you select this mode, the system turns off recirculation and runs the air-conditioning compressor unless the outside temperature is at or below freezing. The recirculation mode is cancelled when you enter defog mode. If you select recirculation while in defog mode, it will be cancelled after 10 minutes. If you have fogging on the side windows, remain in defog or defrost mode until they clear. There is a solar sensor located on the instrument panel, near the windshield. There is also an interior temperature sensor located next to the steering wheel on the instrument panel. These sensors monitor the solar radiation and the air inside your vehicle, then use the information to maintain the selected temperature by initiating needed adjustments to the temperature, the fan speed and the air delivery system. The system may also supply cooler air to the side of the vehicle facing the sun. The recirculation mode may also be activated, as necessary. Do not cover the sensors or the automatic climate control system will not work properly. 3-52