2008 Cadillac SRX Owner's Manual - Page 168

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 the windshield. Rear Window Defogger The rear window defogger uses a warming grid to remove fog or frost from the rear window. < (Rear Defogger): W (Floor/Defog): Use this mode to clear the windows of fog and warm the passengers. The system turns off recirculation and runs the air conditioning compressor unless the outside temperature is at or below freezing. If recirculation mode is selected while using the defog mode, the system recirculates air initially but returns to the fresh air mode after 10 minutes. Press the center of the right control to turn the rear window defogger on or off. Be sure to clear as much snow from the rear window as possible. The rear window defogger turns off about 20 minutes after the button is first pressed if the vehicle is moving at slower speeds. At higher vehicle speeds, the rear defogger can stay on continuously. Each additional press runs the defogger for about 10 minutes. The heated outside rearview mirrors also heat to help clear fog or frost from the surface of the mirror when the rear window defogger is on. Notice: Do not use a razor blade or sharp object to clear the inside rear window. Do not adhere anything to the defogger grid lines in the rear glass. These actions may damage the rear defogger. Repairs would not be covered by your warranty. Use this mode to remove fog or frost from the windshield more quickly. When selected, the system turns off recirculation and runs the air conditioning compressor, unless the outside temperature is at or below freezing. Do not drive the vehicle until all the windows are clear. 0 (Defrost): 3-28