1996 Ford F150 Owner's Manual - Page 85

NORM A/C Select NORM A/C to get refrigerated outside air through the instrument panel registers. The A/C position is used for cooling except when it is extremely hot or fast cooling of the vehicle is needed. Then, select MAX A/C for fast cooling and return to NORM A/C when you are comfortable. MAX A/C The MAX A/C position produces cool air more rapidly to provide faster cooling of your vehicle. This is possible because cooler air is drawn from inside the passenger area and refrigerated again instead of using warmer outside air. Using inside air will also make the fan sound louder which is normal when using MAX A/C. The air flow will be from the instrument panel registers. FLOOR Air flow will be to the floor when FLOOR is selected. The air cannot be cooled in the FLOOR position but can be heated by rotating the center knob in the RED area. MIX Select MIX to get air to the floor and windshield defrosters at the same time. If the outside temperature is about 50˚ (10˚C) or warmer, the air will also be dehumidified to remove moisture. This feature will help prevent fogging in humid weather. The air can be cooled or heated. V DEF Select V DEF to obtain maximum air flow to the windshield. Rotate the center knob into the RED area for the air temperature required to defrost. When the outside air temperature is 83