Section 12-03A: Air Conditioning System, Manual A/C-Heater | 1996 F-150, F-250, F-350, F-Super Duty and Bronco, F-Super Duty Motorhome Chassis Workshop Manual |
By placing the function control knob (18519) in the VENT position, the climate control system operates an air door within the heater air plenum chamber (18471) that directs outside air through the A/C evaporator housing (19850), into the heater air plenum chamber and out through the registers located in the instrument panel (04320). The volume of air discharged through the instrument panel registers can be controlled by the heater blower motor switch (18578) and temperature can be controlled through the temperature control knob.