Fan Mode on Your AC: Should You Leave It ON or Set It to AUTO?

Wondering what the fan mode on your air conditioner really does? This quick 2-minute guide explains the pros and cons of running your AC fan continuously—even when the cooling isn’t on. Learn how it affects energy use, humidity, air purification, and comfort. Find out whether “Fan ON” or “Auto” is better for your home and when each setting makes sense. For more indoor air quality tips, visit BreatheBetterAir.org