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

October 13, 2020

When your furnace is working like it should, it should give warm air without generating too much sound. While it’s common to catch your furnace making noise as it begins running, other sounds are showing your furnace needs immediate professional support.

Here are some of the most reported furnace noises and what they can mean. If your furnace is making an atypical noise, our friendly heating pros are here to assist with the best furnace repair in Mount Hope, WV.

1. Furnace Making a Banging Noise

You could have a serious issue on your hands if you’re hearing your furnace making a banging noise. If your furnace is making a knocking noise, it might signal there could be several problems. These include gas increasing in your furnace or a ductwork situation.

Banging Sounds Coming from Your Furnace

Your heating system turns grimy over time, so that’s why it’s critical to set routine furnace maintenance with Appalachian Heating. One of the tasks our professionals do during this service is clean your furnace’s burners. When this component gets dirty, you may hear your furnace making a loud rumbling noise after ignition takes more time. The resulting gas buildup might fracture your furnace’s heat exchanger, where natural gas turns into heat. Any cracks in it can leak carbon monoxide, which is regularly released outside. This toxic gas can be fatal in large concentrations.

If you’re noticing banging or knocking sounds coming from your furnace, Appalachian Heating recommends turning it off and calling us at 304-707-0600. Significant natural gas in your furnace or a cracked heat exchanger are serious issues that necessitate immediate attention.

Banging Sounds Coming from Your Ductwork

Your furnace uses ductwork to move hot air across your residence. If the ductwork wasn’t put in correctly or is getting old, it can be noisy when your furnace runs. This could be the case if your furnace makes a banging noise when it shuts off. Call Appalachian Heating at 304-707-0600 and we’ll determine the problem.

2. Furnace Making a Buzzing Noise

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

Your furnace relies on an internal transformer to operate on the proper voltage. If wires or the box isn’t tight enough, you might hear a low humming noise in the furnace when off. Your furnace also works with a blower motor, which distributes warm or cold air across your space, and a capacitor, which starts the motor. If either of these components are fading, they will buzz when the furnace turns on.

3. Furnace Making a Rattling Noise

If your furnace is making a rattling noise, it might be due to something minor, like a loose screw, or something serious, like a broken part. In either case, we recommend shutting off your furnace and getting in touch with our heating pros at 304-707-0600 for support.

4. Furnace Making a Squealing Noise

If your furnace makes a high-pitched noise, like squealing, when it’s heating, it’s making an effort to alert you it requires some TLC. If you’ve skipped furnace maintenance the last couple of years, belts could be worn down or a bearing could need to be lubed. We realize 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 hearing your furnace making a whistling noise, it’s typically the result of an air leak in your ductwork. You may also be aware of whistling while the furnace is running if a floor vent isn’t tight. If you’ve examined your vents but are still hearing sound, Appalachian Heating can assist you. It’s critical to get loose ductwork taken care of fast, because it can create comfort issues in your home and inflate your heating costs.

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 frequently means there’s a problem with your furnace’s blower. Shut down your furnace off right away and contact us at 304-707-0600 for assistance.

When you’re getting a weird noise from your furnace, Appalachian Heating is here to support you. Contact us at 304-707-0600 to schedule your furnace repair appointment today.