2007 Toyota Avalon Owners Manual - Page 659

Air conditioning filter- -Checking and replacing the air conditioning filter The air conditioning filter may clog after long use. The filter may need to be cleaned or replaced if the air flow of the air conditioner and heater experiences extreme reductions in operating efficiency, or if the windows begin to fog up easily. To maintain the air conditioning efficiency, cleaning and replace the air conditioning filter according to the maintenance schedule. In dusty areas or areas with heavy traffic flow, such as inner city or desert areas, early replacement may be required. (For scheduled maintenance information, please refer to the "Scheduled Maintenance Guide" or "Owner's Manual Supplement".) The air conditioning filter information label is placed as shown and indicates that a filter has been installed. The air conditioning filter prevents dust from entering the vehicle through the air conditioning vent. This air conditioning system has a high efficient air refiner filter which helps eliminate dust and pollen, thereby increasing your driving comfort. The air conditioning filter is set behind the glove box. 239