This is one of the most searched HVAC questions online. Should my thermostat fan setting be set to auto or on? Your thermostat fan setting (either auto or on) controls the blower on your HVAC system. The blower is what helps push hot or cold air though the home until the air reaches the temperature on the thermostat setting.
AUTO means that the fan turns on automatically when your system is heating or cooling air. Once the thermostat reaches the desired temperature, the entire system shuts off until the next cycle.
ON means that the fan is constantly running and blowing air even when your HVAC system is not heating or cooling air.
Ultimately, it’s your choice whether you set your thermostat to auto or on fan setting. If you have an air cleaner like a UV light, air scrubber or LED light then we would recommend settings the AC fan to “on” so that the air is continuously cleaned and circulated.
If you want to cut down on energy bills, “auto” may be the best option for you so you aren’t spending additional money running the fan.
Is comfort most important? Then “on” is your best choice so that air is distributed more evenly throughout the home.
If you have a more traditional thermostat that does not have a digital display, there should be a toggle switch or small knob that can be adjusted from auto to on. This switch is usually located right on the front of the thermostat. It can sometimes be on the side.
If you have a digitally based thermostat like an ecobee, nest, or the like, then you will need to go into the settings menu by touching the 3 little menu bars on the home display and finding fan settings from there. You may also be able to access these settings from your mobile app. Each thermostat is slightly different.
If you are in the Cincinnati area and would like an estimate on adding air cleaning solutions to your home, just book an estimate online or give us a call at 513.620.4822.