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

When your furnace is working correctly, it should provide heat without generating too much disruption. While it’s normal to hear your furnace making noise as it turns on, other disruptions are signaling your furnace should get immediate professional help.

Here are some of the most reported furnace noises and what they could mean. If your furnace is making an odd noise, our friendly heating pros are here to fix the problem with the best furnace repair in South Beloit and Belvidere.

1. Furnace Making a Banging Noise

You could have an urgent issue on your hands if you’re noticing your furnace making a banging noise. If your furnace is making a knocking noise, it may mean there could be a few problems. These involve gas building up in your furnace or a ductwork issue.

Banging Sounds Coming from Your Furnace

Your heating system gets grimy over the years, so that’s why it’s critical to set yearly furnace maintenance with Fleming Heating & Air Conditioning Inc.. One of the jobs our technicians complete during this work is clean your furnace’s burners. When this part gets grimy, you might hear your furnace making a loud rumbling noise after ignition is delayed. The resulting gas buildup may break your furnace’s heat exchanger, where natural gas transforms into heat. Any fractures in it can discharge carbon monoxide, which is ordinarily released outside. This hazardous gas can be lethal in large concentrations.

If you’re hearing banging or knocking sounds coming from your furnace, Fleming Heating & Air Conditioning Inc. advises turning it off and reaching us at 877-389-2465. Too much natural gas in your furnace or a cracked heat exchanger are critical problems that necessitate fast attention.

Banging Sounds Coming from Your Ductwork

Your furnace relies on ductwork to provide heated air around your home. If the ductwork wasn’t put in right or is getting dated, it can be noisy when your furnace is on. This can be the case if your furnace makes a banging noise when it shuts off. Contact Fleming Heating & Air Conditioning Inc. at 877-389-2465 and we’ll pinpoint the problem.

2. Furnace Making a Buzzing Noise

If you observe 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 operate on the correct 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 has a blower motor, which distributes heated or cold air around your house, and a capacitor, which turns on the motor. If either of these pieces are going out, they will buzz when the furnace switches on.

3. Furnace Making a Rattling Noise

If your furnace is making a rattling noise, it could be related to something little, like an unfastened screw, or something serious, like a broken part. In either case, we advise shutting your furnace off and calling our heating professionals at 877-389-2465 for support.

4. Furnace Making a Squealing Noise

If your furnace makes a high-pitched noise, like squealing, when it’s on, it’s trying to get your attention it could use some TLC. If you’ve forgotten furnace maintenance recently, belts could be worn down or a bearing could need to be lubed. We realize that maintenance frequently slips your mind, but our techs can get your furnace running quietly again fast.

5. Furnace Making a Whistling Noise

When you’re detecting your furnace making a whistling noise, it’s typically the result of an air leak in your ductwork. You might also be aware of whistling while the furnace is on if a floor vent is loose. If you’ve looked at your vents but are still sensing noise, Fleming Heating & Air Conditioning Inc. can provide support. It’s important to get loose ductwork taken care of without delay, since it can make comfort problems in your home and drive up your gas expenses.

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 sound often means there’s trouble with your furnace’s blower. Switch off your furnace off immediately and reach our professionals at 877-389-2465 for support.

When you’re noticing an atypical noise from your furnace, Fleming Heating & Air Conditioning Inc. is here to provide assistance. Contact us at 877-389-2465 to book your furnace repair appointment now.

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