Why Is My Furnace Fan Always Running?
If you hear your furnace fan running all day everyday, it doesn't necessarily mean there is something wrong. Here are some reasons why: Why It's Always Running Your furnace fan will continuously run usually due to your thermostat's setting which have two fan settings: "Auto" and "On". The auto setting will turn on the fan when heated air needs to be circulated. The On setting will keep your fan running non-stop. A continuously running fan may also be due to a faulty fan limit