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What is the fan “auto/on” switch on the thermostat used for?

April 26, 2017fan Switch thermostat Used

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What is the fan “auto/on” switch on the thermostat used for?

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When the switch is in the “on” position, the fan runs constantly; it gives you constant air circulation. You can use the fan “on” setting to reduce temperature variations in a multistory home. When the switch is in the “auto” position, the fan cycles off and on with the rest of the heating or air conditioning system.