1997 Pontiac Firebird Owner's Manual - Page 141

Comfort Controls I, ,I Temperature Control Knob I Turn the knob to change the temperature of the air flowing from the heating system, Turn it toward the red or clockwise for warmer air and toward the blue or counterclockwise for cooler air. The temperature of the of air cannot be less than the temperature the outsideair. Air ContL b OFF: The system is off. I 2 VENT Air flows through theupper air vents. 1 2 BI-LEVEL: Air is directed through the upper air vents and the heater ducts. With this system, you can control the heating and ventilation in your Pontiac. If you have the air conditioning option, you can alsocontrol cooling. Your vehicle also has the flow-through ventilation system described later inthis section. \r/ HEATER: This setting directs most of the air the through the heater ducts and someof the air through windshield defroster vents. Fan Control Knob. a FAN: Turn this knob to select the forceof air you want. ' BLEND: Air is'directed through the windshield 9 defroster vents and the heater ducts. 9DEFROS'G:This setting directs most of the air through the windshield defroster ventsand some of the air through the heaterducts. 3-2