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What Is The Fan Switch On Your Thermostat For?

The two main on your thermostat are “auto” and “on”, and the fan switch lets you switch between the two.

Flip The Switch

Controlling how your fan blows will help you get the most from your thermostat system. Changing your fan settings can help improve temperature control, air quality, and energy efficiency.

Choosing Your Setting

Two main settings on your HVAC fan switch let you decide how best to circulate air in your home.

Set to Automatic

When the fan switch is set to “auto”, the blower in your HVAC system will circulate the hot and cold air until your space reaches the ideal temperature, then it switches off to rest your system.

Does your home hold temperature well? There may be no need for extra, continuous circulation once you hit the set temperature, so setting your fan switch to auto could be the best option. One perk of the “auto” setting is saving money on your energy bill (because less energy is used) but the start and stop process can put extra wear and tear on your blower motor fan.

Set to On

When the fan switch is set to “on”, your fan will run non-stop. If your home heats and cools unevenly, creating hot and cold spots, the “on” setting may be a better option. Since air is constantly moving, you’ll notice fewer hot and cold pockets of air in your home.

In contrast to the “auto” setting, running your fan constantly could help prolong the life of your blower but may also increase your monthly energy bill.

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