1996 Ford Explorer Owner's Manual - Page 124

s To prevent humidity buildup inside your vehicle, always drive with the EATC System turned on. s Do not put objects under the front seats that interfere with the flow of air to the back seat area. s Remove any snow, ice, or leaves from the air intake area of your EATC System which could block the air intake. The intake area is located at the bottom of the windshield. Service If your EATC is not operating as described here, take it to your dealer to have it checked. System diagnostics are built in which will allow your dealer to readily identify problems that might occur. Rear Fan and Airflow Operation Fan speed adjustment The H (right) knob controls the volume of air flow. Rotate the knob upward to increase fan speed and increase the amount of air entering the vehicle. Three fan speed positions are available and are indicated by dots beside the H knob. The largest dot is high speed position. In O (OFF), all blower motor operation is stopped. Airflow selections Q (Vent) Airflow will be to the upper console registers when Q is selected. R (Floor) Airflow will be to the floor when R is selected. 124