1998 Pontiac Firebird Owner's Manual - Page 147

Comfort Controls Temperature Control Knob Turn the centerknob to change the temperature of the a r flowing fromthe heating system.Turn it toward the i red area (clockwise) warmer a r and toward the blue for i area (counterclockwise)for cooler air. Air Control Knob OFF': The system is off. 2 VENT: Air flows through the upper air vents. 1 2 BI-LEVEL: Air is directed throughthe upper air vents and the heater ducts. With this system,you can control the heating and ventilation in your vehicle. If you havethe air conditioning option,you can also control cooling. Your vehicle also has theflow-through ventilation system described later in this section. Fan Control Knob Turn the fan knob to selectthe force of air you want. l d HEATER: This setting directs most of the a r i through the heater ducts and of the air through the some windshield defroster vents. ' BLEND:Air is directed throughthe windshield 3 defroster vents and the heater ducts. DEFROST: This setting directsmost of the a r i through the windshield defroster vents some of the and air through the heater ducts.