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

When your furnace is working properly, it should give heat without creating too much noise. While it’s expected to catch your furnace making noise as it begins running, other noises are showing your furnace needs immediate professional assistance.

Here are some of the most reported 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 Kearney.

1. Furnace Making a Banging Noise

You could have a critical problem on your hands if you’re detecting your furnace making a banging noise. If your furnace is making a knocking noise, it might mean there could be a couple of problems. These include gas accumulating in your furnace or a ductwork problem.

Banging Sounds Coming from Your Furnace

Your heating system turns filthy over time, so that’s why it’s essential to schedule routine furnace maintenance with Thurston Heating & Air Conditioning. One of the jobs our techs do during this work is clean your furnace’s burners. When this piece gets grimy, you might hear your furnace making a loud rumbling noise after ignition takes longer than normal. The following gas buildup can break your furnace’s heat exchanger, where natural gas turns into warmth. Any breaks in it can emit carbon monoxide, which is regularly emitted outdoors. This toxic gas can be fatal in large concentrations.

If you’re noticing banging or knocking sounds coming from your furnace, Thurston Heating & Air Conditioning recommends turning it off and contacting us at 308-624-3485. Significant natural gas in your furnace or a cracked heat exchanger are critical issues that should get immediate repairs.

Banging Sounds Coming from Your Ductwork

Your furnace uses ductwork to deliver heated air throughout your house. If the ductwork wasn’t put in correctly or is getting old, it can make a lot of noise when your furnace is on. This could be the issue if your furnace makes a banging noise when it shuts off. Get in touch with Thurston Heating & Air Conditioning at 308-624-3485 and we’ll pinpoint the problem.

2. Furnace Making a Buzzing Noise

If you hear your furnace making a buzzing noise, don’t wait to call us. A buzzing sound often is telling you there’s an electrical problem, like with its transformer, blower motor or capacitor.

Your furnace relies on an internal transformer to run on the right voltage. If wires or the box isn’t tight enough, you might notice a low humming noise in the furnace when off. Your furnace also has a blower motor, which moves heated or cold air throughout your residence, and a capacitor, which turns on the motor. If either of these pieces are failing, they will buzz when the furnace turns on.

3. Furnace Making a Rattling Noise

If your furnace is making a rattling noise, it could be the result of something little, like a loose screw, or something major, like a broken part. In either case, we recommend shutting off your furnace and contacting our heating specialists at 308-624-3485 for help.

4. Furnace Making a Squealing Noise

If your furnace makes a high-pitched noise, like squealing, when it’s on, it’s attempting to get your attention it requires some TLC. If you’ve neglected furnace maintenance recently, belts could be worn out or a bearing could need to be greased. We know that maintenance sometimes slips your mind, but our techs can get your furnace heating quietly again rapidly.

5. Furnace Making a Whistling Noise

When you’re noticing your furnace making a whistling noise, it’s typically because of an air leak in your ductwork. You may also be aware of whistling while the furnace is working if a floor vent isn’t secure. If you’ve looked at your vents but are still sensing whistling, Thurston Heating & Air Conditioning can provide support. It’s essential to get loose ductwork fixed fast, because it can result in comfort problems in your residence and increase your energy bills.

6. Furnace Making a Grinding Noise

It’s not a positive sign if you notice your furnace making a grinding noise. This metal-on-metal sound typically means there’s an issue with your furnace’s blower. Switch off your furnace off promptly and reach our pros at 308-624-3485 for assistance.

When you’re hearing a strange noise from your furnace, Thurston Heating & Air Conditioning is available to support you. Contact us at 308-624-3485 to request your furnace repair appointment today.

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