1996 Chevrolet Astro Owner's Manual - Page 123

You can turn the defogger off at any time by pressing the bottom of the switch. not The defogger will shut itself off after several minutes so that the glass does get too hot. If the window still isn't clear, turn the defogger on again. NOTICE: Scraping the inside of your rear window could cut and damage the defogger.Your warranty would not cover this damage. And don't put decals there, you might have scrape themoff. to Ventilation System Your vehicle's ventilation system supplies outside air to inside of your the vehicle when it is moving. With the side windows closed, air will flow into the front air inlet grilles at the base of the windshield, through the vehicle and out the rear air exhaustvalves. Outside airwill also enterthe vehicle when the heater or the air conditioning fan is running. Venfilation Tips 0 Keep the hood and front air inlet free of ice, snow, or any other obstruction (such asleaves). The heater and defroster will work far better, reducing the chance of fogging theinside of your windows. 0 When you enter a vehicle in cold weather, turn the blower fan HIGH for a to off. of snow and few moments before driving This helps clear the intake ducts moisture, and reduces the change fogging theinside of your windows. of Keep the air path under the front seats clearof objects. This helpsair to circulate throughoutyour vehicle. 0 3-5