1997 Pontiac Bonneville Owner's Manual - Page 149

Ventilation Tips 0 Keep the hood and front air inlet free of ice, snow or any other obstruction such as leaves. The heater and defroster will work better, reducing the chance of fogging your windows. 0 Defogging and Defrosting On cool, humid days, use DEFOG 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. If you have the standard system, use DEFOG and adjust the fan speed to your comfort level. Use DEFROST with the temperature toward'the red area and the fan control toward high. When you enter a vehicle with standard systemin the cold weather, select HEATER to supply air through the floor outlets.Then turn the fan on high for a few moments before driving away. This will blow moist air from the intake outlets toward the floor, not the windshield. It reduces the chance #offogging your windows. If you have the electronic system, the AUTO setting will do this for you. Manual operation of the electronic systemin the HEAT mode willalso supply air though the floor outlets. 0 If you havethe electronic system, press the DEFOG button and adjust the fan speed by pressing the fan button up or down to your comfort level. Adjust fan speed by pressing the fan up or down mow. If you select DEFROST from AUTO, the system will control the fan speed. Adjust the temperature to your comfort Keep the air path under the front 'seats clear of objects. level by pressing the TEMP up or down arrow. T h i s helps air to circulate throughout your vehicle. 0 When the engine idles for a long time, the exterior temperature sensor may cause the system to blow air that is.too cool. Once the vehicle is moving again the system will try to maintain the set temperature inside your vehicle. When you start your vehicle the EXT TEMP and display flashes (electronic systemonly) for some time, the system may need repair.See your Pontiac dealer. 3-8