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

When your furnace is working correctly, it should provide warm air without making too much disruption. While it’s common to hear your furnace making noise as it begins running, other sounds are showing your furnace should get immediate professional assistance.

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

1. Furnace Making a Banging Noise

You could have a critical situation on your hands if you’re noticing your furnace making a banging noise. If your furnace is making a knocking noise, it may signal there could be several problems. These include gas accumulating in your furnace or a ductwork situation.

Banging Sounds Coming from Your Furnace

Your heating system turns dirty over time, so that’s why it’s critical to set annual furnace maintenance with Alan Energy Services Air Conditioning and Heating Company. One of the jobs our techs complete during this service is clean your furnace’s burners. When this part gets grubby, you could hear your furnace making a loud rumbling noise if ignition takes more time. The following gas buildup might fracture your furnace’s heat exchanger, where natural gas changes into warmth. Any fractures in it can emit carbon monoxide, which is ordinarily vented outdoors. This hazardous gas can be fatal in large concentrations.

If you’re hearing banging or knocking sounds coming from your furnace, Alan Energy Services Air Conditioning and Heating Company advises turning it off and calling us at 630-570-0252. Significant natural gas in your furnace or a broken heat exchanger are dangerous problems that require immediate service.

Banging Sounds Coming from Your Ductwork

Your furnace works with ductwork to deliver heated air around your house. If the ductwork wasn’t installed right or is getting old, it can be noisy when your furnace is on. This might be the problem if your furnace makes a banging noise when it shuts off. Contact Alan Energy Services Air Conditioning and Heating Company at 630-570-0252 and we’ll figure out the problem.

2. Furnace Making a Buzzing Noise

If you hear your furnace making a buzzing noise, don’t hesitate to call us. A buzzing sound frequently indicates an electrical situation, like with its transformer, blower motor or capacitor.

Your furnace uses an internal transformer to run on the right voltage. If wires or the box isn’t tight enough, you may hear a low humming noise in the furnace when off. Your furnace also works with a blower motor, which moves hot or cold air across your space, and a capacitor, which starts the motor. If either of these parts are fading, they will buzz when the furnace starts.

3. Furnace Making a Rattling Noise

If your furnace is making a rattling noise, it might be due to something minor, like an unfastened screw, or something major, like a broken piece. In either case, we advise shutting your furnace off and getting in touch with our heating pros at 630-570-0252 for help.

4. Furnace Making a Squealing Noise

If your furnace makes a high-pitched noise, like squealing, when it’s heating, it’s trying to alert you it needs some TLC. If you’ve forgotten furnace maintenance the last couple of years, belts could be worn down or a bearing may need to be greased. We realize that maintenance often slips your mind, but our professionals can get your furnace operating quietly again fast.

5. Furnace Making a Whistling Noise

When you’re noticing your furnace making a whistling noise, it’s likely the result of an air leak in your ductwork. You might also hear whistling while the furnace is on if a floor vent isn’t secure. If you’ve examined your vents but are still hearing noise, Alan Energy Services Air Conditioning and Heating Company can provide support. It’s critical to get loose ductwork fixed quickly, because it can result in comfort problems in your residence and drive up your energy bills.

6. Furnace Making a Grinding Noise

It’s not a positive sign if you hear your furnace making a grinding noise. This metal-on-metal racket often means there’s an issue with your furnace’s blower. Shut down your furnace off promptly and reach us at 630-570-0252 for assistance.

When you’re getting an uncommon noise from your furnace, Alan Energy Services Air Conditioning and Heating Company is available to help. Contact us at 630-570-0252 to schedule your furnace repair appointment now.

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