Ford 1997 Aerostar 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
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