2003 Buick Park Avenue Owner's Manual - Page 153

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. Rear Window Defogger The rear window defogger uses a warming grid to remove fog or frost from the rear window. REAR: Press this button to turn the rear window defogger on or off. Be sure to clear as much snow from the rear window as possible. At speeds above 30 mph (48 km/h), the defogger will operate continuously until you press the REAR button again. After 10 minutes of driving below 30 mph (48 km/h), the defogger will turn off automatically. If you need additional warming time, push the button again. The system will then operate for five minutes before going off by itself. 9 FRONT: Press the FRONT button to defrost the windshield by directing airflow toward the windshield and outboard outlets (for the side windows). To turn off FRONT, press the AUTO or AIR FLOW buttons. If the AIR FLOW up button is pressed while in the FRONT defrost mode, the system will direct the air toward the instrument panel outlets. If the AIR FLOW down button is pressed while in the FRONT defrost mode, the system will direct the air toward the floor, and the FRONT defrost mode will cancel. Do not drive the vehicle until all the windows are clear. If your vehicle has heated outside rearview mirrors, the mirrors will heat to help clear fog or frost from the surface of the mirror when the rear window defogger button is pressed. Notice: Don't use a razor blade or something else sharp on the inside of the rear window. If you do, you could cut or damage the defogger and the repairs would not be covered by your warranty. Do not attach a temporary vehicle license, tape, a decal or anything similar to the defogger grid. 3-28