Select Fan Setting (Auto/On) - Honeywell RTHL3550D1006 Operating Manual

Operating Manual
Select the fan setting About your new thermostat
Fan System
Auto
Fan System
On
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Press the FAN button to select Auto or On.
Heat
In "Auto" mode (the most commonly used setting),
the fan runs only when the heating or cooling sys-
tem is on. If set to "On," the fan runs continuously.
Heat
MCR32591
6