Ford galaxy 1998 Taurus Owner's Manual page 26

Controls and features
FLR & DEF-Distributes outside
air through the windshield
defroster ducts and the floor
ducts. Heating and air
conditioning capabilities are
provided in this mode. For
added customer comfort, the air
distributed through the floor
ducts will be slightly warmer
than the air sent to the
windshield defroster ducts. If
the temperature is about 10°C
(50°F) or higher, the air
conditioner will automatically
dehumidify the air to prevent
fogging.
DEF -Distributes outside
air through the windshield
defroster ducts. It can be used
to clear ice or fog from the
windshield. If the temperature is
about 10°C (50°F) or higher, the
air conditioner will automatically
dehumidify the air to prevent
fogging.
Operating tips
In humid weather, select DEF
before driving. This will
prevent your windshield from
fogging. After a few minutes,
select any desired position.
To prevent humidity buildup
inside the vehicle, don't drive
with the climate control system
in the OFF position.
Don't put objects under the
front seat that will interfere with
the airflow to the back seats (if
equipped).
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