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Banging, Screeching and Rattling: What 6 Ordinary Furnace Noises Mean

When your furnace is operating correctly, it should provide warm air without creating too much sound. While it’s normal to hear your furnace making noise as it begins running, other disruptions are showing your furnace should get immediate professional help.

Here are some of the most frequent furnace noises and what they can be signaling. If your furnace is making a strange noise, our friendly heating specialists are here to fix the problem with the best furnace repair in Mechanicsville.

1. Furnace Making a Banging Noise

You might have a serious problem on your hands if you’re detecting your furnace making a banging noise. If your furnace is making a knocking noise, it might indicate there could be a couple of problems. These range from gas increasing in your furnace or a ductwork issue.

Banging Sounds Coming from Your Furnace

Your heating system turns filthy as time passes, so that’s why it’s important to set annual furnace maintenance with M & S Heating & Air LLC. One of the things our pros do during this work is clean your furnace’s burners. When this piece gets grimy, you may hear your furnace making a loud rumbling noise when ignition takes more time. The subsequent gas buildup can fracture your furnace’s heat exchanger, where natural gas turns into warm air. Any cracks in it can leak carbon monoxide, which is ordinarily emitted outside. This dangerous gas can be fatal in large concentrations.

If you’re noticing banging or knocking sounds coming from your furnace, M & S Heating & Air LLC recommends turning it off and calling us at 301-363-4699. Excessive natural gas in your furnace or a cracked heat exchanger are critical problems that require prompt attention.

Banging Sounds Coming from Your Ductwork

Your furnace relies on ductwork to deliver heated air across your home. If the ductwork wasn’t installed properly or is aging, it can make a lot of noise when your furnace runs. This can be the case if your furnace makes a banging noise when it shuts off. Get in touch with M & S Heating & Air LLC at 301-363-4699 and we’ll pinpoint the problem.

2. Furnace Making a Buzzing Noise

If you hear your furnace making a buzzing noise, don’t delay calling us. A buzzing sound typically means there’s an electrical situation, like with its transformer, blower motor or capacitor.

Your furnace relies on an internal transformer to operate on the right voltage. If wires or the box isn’t tight enough, you may detect a low humming noise in the furnace when off. Your furnace also works with a blower motor, which moves warm or cooled air across your house, and a capacitor, which triggers the motor. If either of these components are failing, they will buzz when the furnace starts.

3. Furnace Making a Rattling Noise

If your furnace is making a rattling noise, it can be due to something small, like an unsecure screw, or something serious, like a broken component. In either case, we advise shutting your furnace off and contacting our heating professionals at 301-363-4699 for support.

4. Furnace Making a Squealing Noise

If your furnace makes a high-pitched noise, like squealing, when it’s going, it’s making an effort to tell you it requires some TLC. If you’ve skipped furnace maintenance the past few years, belts could be worn down or a bearing might need to be lubricated. We realize that maintenance sometimes slips your mind, but our professionals can get your furnace running quietly again rapidly.

5. Furnace Making a Whistling Noise

When you’re detecting your furnace making a whistling noise, it’s likely the result of an air leak in your ductwork. You could also hear whistling while the furnace is operating if a floor vent isn’t tight. If you’ve examined your vents but are still hearing sound, M & S Heating & Air LLC can assist you. It’s essential to get loose ductwork repaired quickly, since it can create comfort issues in your home and inflate your gas bills.

6. Furnace Making a Grinding Noise

It’s not a positive sign if you detect your furnace making a grinding noise. This metal-on-metal racket typically means there’s an issue with your furnace’s blower. Shut down your furnace off promptly and contact us at 301-363-4699 for assistance.

When you’re noticing a strange noise from your furnace, M & S Heating & Air LLC is ready to help. Contact us at 301-363-4699 to schedule your furnace repair appointment right away.

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