1998 Chevrolet Express Van Owner's Manual - Page 138

w. HEAT/DEFROST Use this setting to divide + ' airflow between the heaterfloor vents and windshield. DEFROST This setting directs air through the windshield defroster vents. This setting is useful when on you have fog or ice the windshield. Fan Knob The knob on the left side of the heating system control panel controls the fan speed. The knob has four speed positions. To increase airflow, move the knob toward HI. To decrease airflow, move it towardLO. To turn the on fan off, move the mode knob the far right to OFF. Temperature Knob The middle knob on the control panel lets you select the relative temperature of the air flowing into the passenger area of your vehicle. This knob will allow youto adjust the relative air temperature independently of the function knob setting. Move the knob toward the red area forwarmer air. Move the knob toward the blue area for cooler air. Mode Knob The right knob on the control panel changes the heatedair conditioning setting. MAX A/C: Move the rightknob to MAX A/C for maximum cooling. This setting puts the system in the recirculation mode and helpsto maximize your air conditioner's performance and your vehicle's fuel economy. This setting also cools the air the fastest. After the vehicle's interiorreaches a comfortable temperature, move the knob to the right to place the airconditioning system in the A/C mode. Heater/Air Conditioning Controls If your vehicle has air conditioning, your heatedair conditioning controls will look like this. Before using your vehicle's air conditioning, open the windows to clear the vehicle of hot air. 3-3