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Banging, Screeching and Rattling: What 6 Typical Furnace Noises Signify

When your furnace is working correctly, it should give warmth without creating too much sound. While it’s common to catch your furnace making noise as it begins running, other disruptions are indicating your furnace needs immediate professional help.

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

1. Furnace Making a Banging Noise

You might have a critical situation on your hands if you’re hearing your furnace making a banging noise. If your furnace is making a knocking noise, it might indicate there could be several problems. These involve gas building up in your furnace or a ductwork situation.

Banging Sounds Coming from Your Furnace

Your heating system gets filthy over time, so that’s why it’s essential to set routine furnace maintenance with WM J Kraus & Son. One of the tasks our techs complete during this work is clean your furnace’s burners. When this component gets grimy, you might hear your furnace making a loud rumbling noise if ignition takes longer than normal. The following gas buildup might break your furnace’s heat exchanger, where natural gas changes into warmth. Any fractures in it can discharge carbon monoxide, which is ordinarily vented outdoors. This toxic gas can be fatal in large concentrations.

If you’re hearing banging or knocking sounds coming from your furnace, WM J Kraus & Son advises turning it off and calling us at 319-229-2318. Excessive natural gas in your furnace or a broken heat exchanger are hazardous issues that require prompt repairs.

Banging Sounds Coming from Your Ductwork

Your furnace relies on ductwork to move heated air across your home. If the ductwork wasn’t put in correctly or is getting old, it can be loud when your furnace is on. This can be the issue if your furnace makes a banging noise when it shuts off. Call WM J Kraus & Son at 319-229-2318 and we’ll determine the problem.

2. Furnace Making a Buzzing Noise

If you observe your furnace making a buzzing noise, don’t wait to call us. A buzzing sound frequently means there’s an electrical situation, like with its transformer, blower motor or capacitor.

Your furnace depends on an internal transformer to run on the right voltage. If wires or the box isn’t tight enough, you could notice a low humming noise in the furnace when off. Your furnace also uses a blower motor, which sends heated or chilly air around your house, and a capacitor, which triggers the motor. If either of these parts are failing, they will buzz when the furnace switches on.

3. Furnace Making a Rattling Noise

If your furnace is making a rattling noise, it might be the result of something small, like a loose screw, or something critical, like a broken piece. In either case, we recommend shutting off your furnace and contacting our heating professionals at 319-229-2318 for support.

4. Furnace Making a Squealing Noise

If your furnace makes a high-pitched noise, like squealing, when it’s going, it’s trying to alert you it could use some TLC. If you’ve neglected furnace maintenance recently, belts could be worn out or a bearing might need to be greased. We know that maintenance sometimes slips your mind, but our pros can get your furnace running quietly again fast.

5. Furnace Making a Whistling Noise

When you’re hearing your furnace making a whistling noise, it’s typically due to an air leak in your ductwork. You may also notice whistling while the furnace is on if a floor vent isn’t secure. If you’ve checked your vents but are still sensing whistling, WM J Kraus & Son can provide support. It’s essential to get loose ductwork repaired without delay, because it can result in comfort problems in your home and increase your utility bills.

6. Furnace Making a Grinding Noise

It’s not an encouraging sign if you detect your furnace making a grinding noise. This metal-on-metal racket frequently means there’s trouble with your furnace’s blower. Turn off your furnace off promptly and call us at 319-229-2318 for assistance.

When you’re hearing a strange noise from your furnace, WM J Kraus & Son is here to support you. Contact us at 319-229-2318 to book your furnace repair appointment today.

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