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