Function Selector Modes: Def
WARNING: This page is about a different car, the 1995 Ford RV Cutaway, 1995 Ford Econoline, 1995 Ford Cutaway, and 1995 Ford Club Wagon. However, it is still accessible from the selected car via links, so may be relevant.
In DEF (defrost) mode, outside air is routed through system and out defroster outlets. Vacuum is not applied to outside/recirculated air, floor/defrost and panel/defrost vacuum motors. Blower motor speed and temperature can be adjusted to desired settings.