Carrier Performance EDGE Owner's Manual page 27

Using the programmable fan
When you use the instructions on page 47 in the Advanced
Programming Options section to turn on the programmable fan
feature, you can program the fan selection to "auto" or "on" for each
of the program schedule periods. When scheduling and setting your
program periods, simply press the fan button at the top to select auto
or on for that period. You can make this change in as many days and
time periods as desired.