Honeywell RTH6450D1009/A 用户手册

Press the 

FAN button to select Auto or On.

In “Auto” mode (the most commonly used
setting), the fan runs only when the heat-
ing or cooling system is on. If set to “On,”
the fan runs continuously.

M28405

Set Clock/Day/

Schedule

Auto

Heat

M28406

Set Clock/Day/

Schedule

On

Heat