Function Control Lever/Buttons
There are 5 positions. Slide lever or push appropriate button to direct fresh or recirculated air to and from heater, defrosters (some models) and vents.
To ventilate air, set temperature dial or lever in Cold position. Select Fresh Air position with air select button or lever. Set function lever or button in Vent (Face) position. Outside air will now flow through side and center vents.
To defrost windshield or windows, set temperature lever or dial in Hot position. Select Defrost position with appropriate function button or lever, and switch on fan. Warmed (outside) air will flow from windshield and side defroster vents.