1997 Pontiac Firebird Owner's Manual - Page 143

Heating The heater works best if you keep your windows closed while using it. 1, Turn the air control knob to BI-LEVEL. 2. Turn the temperamre control knob to a comfortable setting. 3. Turn the fan control knob to the desired speed. 1. Turn the air control knob to HEATER. 2. Turn the fan control knob the desired speed. to 3. Turn the temperature control knob a to comfortable setting. Ventilation For mild outside temperatures when little heating or cooling is needed, you can still direct outside air through your vehicle. During initial start-up only, if your vehicleis equipped h'eater, you can use it in with an optional engine coolant cold weather (around +20°F/-8"C or lower) to improve heater performance on start up, Because an engine coolant heater warms the enginecoolant, your vehicle's heating system can moreefficiently pro'videheat for the passenger area of your vehicle. See "Engine Coolant Heater" in the Index. I , Turn the air control knobto VENT. 2. Turn the temperature control knob to a co'mfortable setting. 3 . Turn the fan control knobto the desired speed. Defogging and Defrosting 1. 'Turn the air cantrol knobto DEFROST. 2 . Turn the temperature control knobto the desired setting. Bi-Level Heating You may want to use bi-level heating on cool, but sunny days. This setting directs cool air toward your body and warmer air toward your feet. 3. Turn the fan control knobto the desired speed. 3-4