FORD 2004 F-150 v.1 - Manual (Page 37)

13. Auto: To engage automatic temperature control, press AUTO and
select the desired temperature using the temperature control. The
system will automatically determine fan speed, airflow location, A/C on
or off, and outside or recirculated air, to heat or cool the vehicle to reach
the desired temperature.
ELECTRONIC AUTOMATIC TEMPERATURE CONTROL (EATC)
SYSTEM WITH HEATED SEATS (IF EQUIPPED)
Temperature conversion: To switch between Fahrenheit and Celsius:
If your vehicle is equipped with a full message center, refer to Units
(Fahrenheit/Celsius) in the Driver Controls chapter.
Climate Controls
37