Sorry, the web browser you're using is not supported by this website.

Please use Google Chrome, Firefox, Safari, or another browser to access Thank you.

Skip to main content

We use cookies to enhance your experience. For details on how we use cookies, collect data, & how to manage your consent please see our Cookie Policy & Privacy Policy.

Should the fan on my furnace be running constantly?

When your thermostat is set to auto, your furnace fan should only blow when your furnace is in the middle of a heating cycle. It's not normal if your fan runs constantly, even if your furnace is not heating. Is this true? There's a shorted thermostat wire and a fan limit switch.

Let's Get It Fixed!

Our virtual experts can diagnose your issue (for free!) and resolve simple problems.

What Did You Think of This Article?

What Did You Think of This Article?

Shop Recommended ProductsShop HomeX Recommended Products