2001 Cadillac DeVille Owner's Manual - Page 196

Defogging and Defrosting On cool, humid days, use defog HEATER/DEFROST to keep the windshield and side windows clear. Use defrost to remove fog or ice from the windshield quickly in extremely humid or cold conditions. Press the DEFROST button to select DEFROST. Adjust the fan speed by pressing the fan button up or down. If you select DEFROST from AUTO, the system will control the fan speed. The temperature also needs to be adjusted by turning the TEMP knob. RECIRCULATION is not available in the defrost mode. The air conditioning will run when in the defrost mode. The system will automatically shut off after 10 minutes of use. If you turn it on again, the defogger will operate for about five minutes. However, if your vehicle is traveling above 30 mph (48 km/h) the system will not shut off. You can also turn the defogger off by turning off the ignition or by pressing the button again. Do not attach a temporary vehicle license, tape or decals across the defogger grid on the rear window. 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 warming grid or the integrated rear window antenna, and the repairs wouldn't be covered by your warranty. Rear Window Defogger The lines you see on the rear window warm the glass. Press this button to turn on the rear defogger. With it, the rear window and both outside rearview mirrors are heated. 3-7