Function Control
WARNING: This page is about a different car, the 1995 Ford Aerostar. However, it is still accessible from the selected car via links, so may be relevant.
Front function selector knob controls air distribution for front and auxiliary systems. Function selector knob is located on instrument panel, on right side of steering wheel. When knob is in FLR, MIX or defrost position, auxiliary unit is in heat mode, distributing air through louvers to floor. When knob is in VENT position, rear unit is in recirculating mode, delivering air through side wall and overhead registers. With knob in either A/C position, rear unit is in A/C mode, delivering cooled air through side wall and overhead registers.