1997 Oldsmobile Achieva Owner's Manual - Page 134

Heating On cold days,use HEAT with the temperature knob all the way in the red area. Thesystem will bring in outside air, heat it and send it to the floor ducts. If your vehicle has an engine coolantheater, you can use it tohelp your system provide warm air faster when it's cold outside (O'F (-18°C) or lower). An engine coolant heater warms the coolant your engine and heating system use toprovide heat. See "Engine Coolant Heater" in the Index. Defogging andDefrosting There are two settings for clearingyour windows. For each setting, adjust the temperature control as desired. To rapidly defrost the windshield, rotate the temperature control to maximum heat and rotate the mode control to fan the defrost symbol. Rotate the to the highest speed. Your vehicle is equipped with side window defogger vents. The side window defogger vents are located on each end of the instrument panel. For additional side window defogging, rotate the mode control tothe BI-LEV position, rotate the fan control to the highest speed and aim the side vents on the instrument panel to the side window. For increased airflow to the side vents, close the center vents. 3-4