Banging, Screeching and Rattling: What Six Typical Furnace Noises Mean

When your furnace is working properly, it should provide warm air without generating too much disruption. While it’s expected to notice your furnace making noise as it begins running, other disruptions are indicating your furnace should get immediate professional help.

Here are some of the most frequent furnace noises and what they might be indicating. If your furnace is making an atypical noise, our friendly heating professionals are here to help with the best furnace repair in Libertyville, Illinois.

1. Furnace Making a Banging Noise

You may have an urgent problem on your hands if you’re noticing your furnace making a banging noise. If your furnace is making a knocking noise, it might signal there could be several problems. These involve gas accumulating in your furnace or a ductwork issue.

Banging Sounds Coming from Your Furnace

Your heating system turns filthy over time, so that’s why it’s essential to book seasonal furnace maintenance with TopTec. One of the things our pros do during this work is clean your furnace’s burners. When this piece gets grimy, you could hear your furnace making a loud rumbling noise after ignition takes longer than normal. The following gas buildup can fracture your furnace’s heat exchanger, where natural gas changes into warm air. Any breaks in it can leak carbon monoxide, which is regularly released outside. This dangerous gas can be deadly in large concentrations.

If you’re aware of banging or knocking sounds coming from your furnace, TopTec urges you to turn it off and contacting us at 847-362-0262. Too much natural gas in your furnace or a ruptured heat exchanger are serious issues that should get fast service.

Banging Sounds Coming from Your Ductwork

Your furnace works with ductwork to move warm air around your residence. If the ductwork wasn’t designed correctly or is aging, it can make a lot of noise when your furnace is heating. This might be the problem if your furnace makes a banging noise when it shuts off. Contact TopTec at 847-362-0262 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 means there’s an electrical issue, like with its transformer, blower motor or capacitor.

Your furnace relies on an internal transformer to operate on the right voltage. If wires or the box needs to be tightened, you may notice a low humming noise in the furnace when off. Your furnace also uses a blower motor, which distributes warm or chilly air around your rooms, and a capacitor, which turns on the motor. If either of these pieces are fading, they will buzz when the furnace starts.

3. Furnace Making a Rattling Noise

If your furnace is making a rattling noise, it could be related to something little, like a loose screw, or something critical, like a broken part. In either case, we recommend shutting off your furnace and getting in touch with our heating pros at 847-362-0262 for support.

4. Furnace Making a Squealing Noise

If your furnace makes a high-pitched noise, like squealing, when it’s heating, it’s attempting to alert you it needs some TLC. If you’ve skipped furnace maintenance recently, belts could be worn out or a bearing could need to be lubed. We realize that maintenance often slips your mind, but our professionals can get your furnace heating quietly again quickly.

5. Furnace Making a Whistling Noise

When you’re detecting your furnace making a whistling noise, it’s frequently because of an air leak in your ductwork. You might also hear whistling while the furnace is working if a floor vent isn’t tight. If you’ve checked your vents but are still noticing whistling, TopTec can provide support. It’s essential to get loose ductwork fixed without delay, because it can result in comfort issues in your home and increase 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 typically means there’s an issue with your furnace’s blower. Switch off your furnace off right away and contact our pros at 847-362-0262 for assistance.

When you’re getting an uncommon noise from your furnace, TopTec is available to provide assistance. Contact us at 847-362-0262 to book your furnace repair appointment now.