Fan Switch (Auto/On) - Honeywell RTH3100C Manual De Funcionamiento

Operating Manual
Fan switch
Set FAN switch to choose whether the fan
runs continuously or only as needed.
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Set the FAN switch to 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.
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