2002 Chevrolet Blazer Owner's Manual - Page 171

Heating The heater works best if you keep your windows closed while using it. On cold days, use floor mode with the temperature knob turned clockwise. Blend mode is useful in cool weather when you have fog or ice on the windshield or side windows. If you use the optional engine coolant heater before starting your engine, your heating system will produce warmer air faster to heat the passenger compartment in cold weather. See "Engine Coolant Heater" in the Index. Rear Window Defogger (If Equipped) If your vehicle has this feature, the rear window will have lines that warm the glass. Defogging and Defrosting On cool, humid days, use blend mode to keep the windshield and side windows clear. Use defrost mode to remove fog or ice from the windshield quickly in extreme humid or cold conditions. Turn the temperature knob clockwise and move the fan knob toward high. For best results, clear the window of as much snow or ice as possible before using the rear window defogger. To turn on the rear window defogger, find the button marked REAR with the defog symbol on the lower right corner of your climate control system. Press the button until the light in the button comes on, then release it. It will only work if the ignition switch is turned to RUN. Pressing the REAR button on your climate control system will also activate your heated outside mirrors (if equipped). This will help to keep ice and snow from collecting on your mirror surfaces. 3-4