1997 Ford Aerostar Owner's Manual - Page 64

NOTE: Any cleaner or polish that increases the gloss (shine) of the upper part of the instrument panel should be avoided. The dull finish in this area is to help protect the driver from undesirable windshield reflection. The Climate Control Systems Your vehicle is equipped with a control assembly designed to handle either a combination A/C-Heater System or a Heater-Only System. If your vehicle has a factory installed auxiliary system, the front control will be equipped with a rear fan control switch. If it is a factory installed auxiliary system with rear A/C and/or rear heater functions, an auxiliary fan speed control switch is installed in the rear of the vehicle. Instrument Panel Registers There are four registers in the instrument panel. Each of these registers contains a louver assembly which can be manually adjusted to direct airflow up, down, left and right. An illustration of the register locations follows. Instrument panel registers 61