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

When your furnace is running like it should, it should give warmth without making too much disruption. While it’s expected to hear your furnace making noise as it begins running, other disruptions are signaling your furnace requires immediate professional help.

Here are some of the most reported furnace noises and what they can be indicating. If your furnace is making an atypical noise, our friendly heating professionals are here to fix the problem with the best furnace repair in Greensburg.

1. Furnace Making a Banging Noise

You may 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 can indicate there could be a few problems. These involve gas accumulating in your furnace or a ductwork issue.

Banging Sounds Coming from Your Furnace

Your heating system gets filthy as time passes, so that’s why it’s essential to schedule yearly furnace maintenance with Wallpe Heating & Cooling. One of the jobs our technicians perform during this work is clean your furnace’s burners. When this component gets grimy, you may hear your furnace making a loud rumbling noise if ignition takes more time. The subsequent gas buildup can break your furnace’s heat exchanger, where natural gas turns into heat. Any cracks in it can emit carbon monoxide, which is normally released away from your home. This toxic gas can be deadly in large concentrations.

If you’re noticing banging or knocking sounds coming from your furnace, Wallpe Heating & Cooling recommends turning it off and reaching us at 812-663-7252. Too much natural gas in your furnace or a cracked heat exchanger are serious problems that necessitate immediate repairs.

Banging Sounds Coming from Your Ductwork

Your furnace uses ductwork to provide warm air around your house. If the ductwork wasn’t designed correctly or is getting old, it can be noisy when your furnace is heating. This could be the problem if your furnace makes a banging noise when it shuts off. Call Wallpe Heating & Cooling at 812-663-7252 and we’ll figure out 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 often is telling you there’s an electrical issue, like with its transformer, blower motor or capacitor.

Your furnace depends on an internal transformer to run on the correct voltage. If wires or the box is loose, you may detect a low humming noise in the furnace when off. Your furnace also has a blower motor, which sends hot or cooled air across your house, and a capacitor, which starts the motor. If either of these pieces are going out, 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 related to something minor, like an unfastened screw, or something critical, like a broken piece. In either case, we advise shutting your furnace off and getting in touch with our heating professionals at 812-663-7252 for assistance.

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 requires some TLC. If you’ve neglected furnace maintenance the last couple of years, belts could be worn down or a bearing might need to be lubricated. We realize that maintenance often slips your mind, but our pros can get your furnace running quietly again fast.

5. Furnace Making a Whistling Noise

When you’re noticing your furnace making a whistling noise, it’s frequently due to 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 checked your vents but are still hearing noise, Wallpe Heating & Cooling can help. It’s important to get loose ductwork taken care of without delay, because it can create comfort problems in your home and inflate your heating costs.

6. Furnace Making a Grinding Noise

It’s not an encouraging sign if you notice your furnace making a grinding noise. This metal-on-metal sound often means there’s trouble with your furnace’s blower. Shut down your furnace off immediately and call our professionals at 812-663-7252 for help.

When you’re getting a strange noise from your furnace, Wallpe Heating & Cooling is available to support you. Contact us at 812-663-7252 to request your furnace repair appointment right away.

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