Ford Vehicle Owner's Manual page 87

To turn your Heater system on, select any
position except OFF. This will turn the fan ON
and allow air flow into the vehicle. Select OFF to
turn your Heater off. This will turn the fan off
and stop outside air from coming into the
vehicle.
Temperature selection
The Temperature 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 or warmer area. The wide BLUE area
(full left) is the cool or unheated temperature
area. Any position selected between full right
and full left will give a temperature between the
two extreme temperatures. The cool temperature
you select will not be cooler than the outside
temperature.
H Fan speed adjustment
The H knob on the control is the fan speed
knob which controls the volume of air flow.
Rotate the H knob to the right to increase fan
speed and increase the amount of of air entering
the vehicle. Four fan speed positions are
available and are indicated by LO, two separate
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