1997 Ford Aerostar Owner's Manual - Page 69
1997 Ford Aerostar Manual
Page 69 highlights
To turn the heater system on, rotate the SELECT knob to any position except OFF. This turns on the fan and allows airflow into the vehicle. Temperature selection The TEMP knob is the rotating knob located at the center of the control with tapered red and blue bands surrounding most of the knob. The wide red part of the band (full right) is the heat area. The wide blue area (full left) is the cool area. Any position selected between full right and full left will give a temperature between the two extremes. The cool temperature you select will not be cooler than the outside temperature. Fan speed adjustment The left knob or upper left knob with the x is the fan speed knob. Rotate the x knob to the right to increase fan speed and increase the amount of air entering the vehicle. Four fan speed positions are available. Function selection Use VENT to bring outside air through the instrument panel registers. You can heat the air in this position by rotating the TEMP knob into the red area. The air cannot be cooled below the outside temperature regardless of the TEMP knob setting. Airflow will be to the floor when FLR is selected. The air can be heated by rotating the temperature knob into the red area. Select MIX to get air to the floor and windshield defrosters at the same time. Select V to obtain maximum airflow to the windshield. Rotate the TEMP knob into the red area for the air temperature required to defrost. Rotate the x knob to increase or decrease the airflow. 66