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When the fan setting on your thermostat is set to “auto,” that means that your system’s fan will only run during your home’s heating and cooling cycles. Once the desired indoor temperature is reached, the fan shuts off until the next cycle.What does fan on mean on thermostat?
“Auto” means that the fan automatically works ONLY when the air is being heated or cooled. So once your home reaches the temperature set on the thermostat, the fan stops. “On” means the fan is on 24/7, even when the air isn’t being heated or cooled.What does fan Circ mean on my thermostat?
The Circ (Circulate) position if available will run the fan approximately 35% of the time, minus any time the fan will run with the heating or cooling system. Thereof, whats the difference between fan on and circulate? When the heat is on, the fan will only turn on as your home heats up.