What You Should Check Now to Make Sure Your Backup Heat Actually Works
When the temperatures drop and the power goes out, that “backup heat source” you bought starts feeling a lot more serious. But most people don’t realize how many little things can make it fail. Don’t wait for the emergency—here’s what to double-check right now.
Test the Ignition System
If your backup heat uses a spark ignition or blower, it might not run without electricity unless it’s been specifically designed for off-grid. Light it manually and make sure it works the way you expect. If it needs a battery or backup power source, check that it’s charged and ready.
Clean Out Ash and Soot
Wood stoves, pellet stoves, and propane heaters all run better when they’re clean. A clogged flue or dirty combustion chamber can keep the whole system from firing right—or worse, backdraft into the house. Scrub it out now before you’re trying to do it with gloves on in freezing weather.
Stock the Right Fuel
It’s easy to assume you have enough firewood or propane, but have you actually run the numbers? How long does one tank last? How many hours of heat will your stacked wood give you? Know your burn rate and check your supply against it now—not after the first freeze.
Check for Drafts and Heat Loss
Even the best heater won’t do much if warm air is leaking out faster than you can make it. Seal up the spots around doors, windows, and vents. You’ll get way more out of your backup heat source if your house isn’t fighting against it the whole time.
Test Carbon Monoxide Detectors
Any backup heat source—especially propane, kerosene, or wood—can pose a risk of carbon monoxide. Make sure your detectors work, have fresh batteries, and are placed near bedrooms. A silent leak can be fatal, and you won’t smell it coming.
*This article was developed with AI-powered tools and has been carefully reviewed by our editors.
