1994 Oldsmobile Achieva Owner's Manual - Page 111

1111 1111 Ventilation Use when outside temperatures are mild, and little heating or cooling is needed. Turn theright control lmob to VENT. Air flow is directedthrough the instrument panel outlets. Set the center knob to thetemperaturedesired. If you have the optional engine coolantheater and use it during cold weather, 0°F (-18°C) or lower, yourheating system will more quickly provide heat because the engine coolantis already warmed. Seethe Index under Engine Coolant Heater. Heating Turning the right controlknob to HEAT (Heater) and the center knob clockwise willsend heated air through the heater ducts, and some through the defroster vents. VENT and HEAT are economical positions becausethe air conditioner compressor doesn'trun in these two settings. This reduces engine load, resulting in improved fuel economy. If either setting fails to keep you comfortable, or causes your windows to fog up, turn theright knob to one of the air conditioning positions,or to DEF (Defrost). Defrosting The DEF (Defrost) setting directs most air through the defroster vents, and some through the heater ducts. DEFOG. This setting divides airflow equally betweenthe heater ducts and the windshield defrostervents. w Defogging Windows withthe Air Conditioning System To quickly defogthe windshield, turn all three control knobs to the f a r right. w I09