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    Furnace Maintenance Checklist for Winter

    February 15, 20266 min read

    What Should Be on Your Furnace Maintenance Checklist?

    A winter furnace maintenance checklist has four essentials: change the filter (MERV 8+), test the thermostat, clear 3 feet around the furnace, and schedule a professional furnace tune-up before November. Doing these four things every fall prevents roughly 75% of mid-winter breakdowns. Here's the complete checklist - what you can do yourself and what needs a technician.

    What Happens If You Skip Furnace Maintenance?

    Skipping maintenance is the #1 reason furnaces break on the coldest night of the year. A clogged filter forces the system to overheat and shut down. Dust on the burners causes ignition failures. A cracked heat exchanger leaks carbon monoxide. The U.S. Department of Energy notes that neglected furnaces lose efficiency every year - meaning higher gas bills for a house that still feels cold. Already noticing problems? Check out what to do when your furnace won't turn on.

    DIY Checks You Can Do in 15 Minutes

    Swap your filter for a fresh one (MERV 8 or higher). Clear the area around your furnace - no boxes, no chemicals, nothing within three feet. Test the thermostat by bumping it up a few degrees and making sure the furnace kicks on. Walk through your house and check that no vents are blocked by furniture or rugs. These take 15 minutes. That peace of mind lasts all winter.

    How Often Should You Check Your Furnace Filter?

    Check your filter every 30 days during the cold months. If it's dark and clogged, swap it out - a dirty filter makes your furnace work way too hard and can cause it to blow cold air or overheat and shut down. Listen for anything unusual: banging, squealing, or the furnace turning on and off over and over. Watch your energy bill. If it spikes for no reason, something is slipping. Wondering what repairs cost if something goes wrong? See our furnace repair cost guide.

    How Do You Keep Your Family Safe From Carbon Monoxide?

    Test your carbon monoxide detectors and put fresh batteries in. Look at the flue pipe coming out of your furnace - if you see rust, gaps, or pieces that don't connect, that's a CO risk. And if you ever smell gas or rotten eggs near your furnace - stop. Turn off the gas. Open windows. Get your family out and call the gas company right away. Your family's safety is worth more than any repair bill.

    What Does a Professional Furnace Tune-Up Include?

    A professional tune-up includes cleaning the burners, checking the heat exchanger for cracks, testing the ignition system, and calibrating your thermostat. These are things you can't do yourself - and shouldn't try to. At Trouble Free, we've been keeping central Illinois families warm for years. We service furnaces across Peoria, Pekin, Morton, Washington, and the entire area, with tune-ups scheduled as soon as a technician is available. Schedule your tune-up today. To keep your home trouble-free, call (309) 347-5309. Wondering what a new furnace costs if yours is past its prime? We'll give you honest advice. We'll make sure you can sleep easy this winter.