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.

Why does my thermostat says replace battery?

During power outages, batteries help to retain thermostat settings. There is a wire that provides power to thermostats that don't use battery backups. Low batteries in digital thermostats are a common cause of issues that prevent the heating and cooling system in your home from running.

Let's Get It Fixed!

HomeX virtual experts will assess your issue (for free!) and can resolve simple problems.

What Did You Think of This Article?

What Did You Think of This Article?

Shop Recommended ProductsShop HomeX Recommended Products