Honeywell RTH2300 Series Operating Manual page 10

Operating Manual
Select the fan setting
Set
Hold
Run
Heat Off Cool
Heat Off Cool
Set FAN switch to choose whether the fan
runs continuously or only as needed.
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Fan
Fan
Auto On
Auto On
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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 heating
or cooling system is on.
If set to "On," the fan runs continuously.
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