Honeywell RTH6400 - Selecting the Fan Setting; Fan Mode Options (Auto;On)

RTH6400 Programmable Thermostat
7 69-2211EF—05
Select the fan setting
Press the FAN button to select Auto or On.
In“Auto”mode(themostcommonlyused
setting), the fan runs only when the heating
orcoolingsystemison.Ifsetto“On,”the
fan runs continuously.
M28405
Set Clock/Day/
Schedule
Auto
Fan System
Heat
M28406
Set Clock/Day/
Schedule
On
Fan System
Heat