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

When your furnace is working correctly, it should give heat without making too much sound. While it’s normal to catch your furnace making noise as it turns on, other disruptions are showing your furnace requires immediate professional help.

Here are some of the most common furnace noises and what they could be signaling. If your furnace is making a strange noise, our friendly heating specialists are here to assist with the best furnace repair in Williamsport.

1. Furnace Making a Banging Noise

You might have a critical issue on your hands if you’re noticing your furnace making a banging noise. If your furnace is making a knocking noise, it can indicate there could be a couple of problems. These involve gas increasing in your furnace or a ductwork issue.

Banging Sounds Coming from Your Furnace

Your heating system becomes dirty over the years, so that’s why it’s essential to schedule routine furnace maintenance with Lycoming Heating Company. One of the jobs our technicians complete during this service is clean your furnace’s burners. When this component gets grimy, you could hear your furnace making a loud rumbling noise after ignition is delayed. The following gas buildup can fracture your furnace’s heat exchanger, where natural gas transforms into heat. Any cracks in it can emit carbon monoxide, which is regularly vented away from your home. This hazardous gas can be fatal in large concentrations.

If you’re noticing banging or knocking sounds coming from your furnace, Lycoming Heating Company urges you to turn it off and reaching us at 570-244-2510. Too much natural gas in your furnace or a broken heat exchanger are hazardous problems that necessitate prompt repairs.

Banging Sounds Coming from Your Ductwork

Your furnace works with ductwork to provide hot air throughout your residence. If the ductwork wasn’t put in correctly or is getting old, it can make a lot of noise when your furnace runs. This could be the problem if your furnace makes a banging noise when it shuts off. Contact Lycoming Heating Company at 570-244-2510 and we’ll figure out the problem.

2. Furnace Making a Buzzing Noise

If you notice your furnace making a buzzing noise, don’t wait to call us. A buzzing sound typically indicates an electrical problem, like with its transformer, blower motor or capacitor.

Your furnace uses an internal transformer to run on the correct voltage. If wires or the box isn’t tight enough, you could detect a low humming noise in the furnace when off. Your furnace also has a blower motor, which sends hot or chilly air throughout your house, and a capacitor, which triggers the motor. If either of these components 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 may be related to something little, like an unfastened screw, or something critical, like a broken component. In either case, we urge you to shut your furnace off and calling our heating specialists at 570-244-2510 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 tell you it needs some TLC. If you’ve skipped furnace maintenance the last couple of years, belts could be dilapidated or a bearing might need to be lubricated. We know that maintenance sometimes slips your mind, but our pros can get your furnace operating quietly again quickly.

5. Furnace Making a Whistling Noise

When you’re detecting your furnace making a whistling noise, it’s frequently due to an air leak in your ductwork. You could also be aware of whistling while the furnace is operating if a floor vent isn’t secure. If you’ve checked your vents but are still sensing sound, Lycoming Heating Company can provide support. It’s important to get loose ductwork fixed fast, because it can make comfort issues in your house and increase your gas 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 sound typically means there’s a problem with your furnace’s blower. Turn off your furnace off promptly and reach us at 570-244-2510 for assistance.

When you’re getting an atypical noise from your furnace, Lycoming Heating Company is available to help. Contact us at 570-244-2510 to book your furnace repair appointment now.

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