What are the available fan modes on the T6 Pro thermostat?
The T6 Pro has three fan modes: Auto (fan runs only when heating or cooling system is on), On (fan is always on), and Circ (fan runs randomly about 33% of the time). Available fan modes may vary depending on system settings.
From the official Honeywell T6 Pro TH6210U2001 Smart Thermostat manual, page 7
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