1999 Ford F150 Owner Guide 1st Printing - Page 57

Controls and features • FLOOR-Allows for maximum heating. Distributes outside air through the floor ducts. • FLOOR & DEF-Distributes outside air through the floor ducts and the windshield defroster ducts. • DEF -Distributes outside air through the windshield defroster ducts. It can be used to clear ice or fog from the windshield. Operating tips • In humid weather, select before driving. This will help to 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). • Remove any snow, ice or leaves from the air intake area (at the bottom of the windshield under the hood). • When placing objects on top of your instrument panel, be careful to not place them over the defroster outlets. These objects can block airflow and reduce your ability to see through your windshield. Also, avoid placing small objects on top of your instrument panel. These objects can fall down into the defroster outlets and block airflow and possibly damage your climate control system. 57