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

October 13, 2020

When your furnace is operating correctly, it should deliver warmth without generating too much disruption. While it’s expected to notice your furnace making noise as it begins running, other noises are indicating your furnace needs immediate professional support.

Here are some of the most common furnace noises and what they can be signaling. If your furnace is making an odd noise, our friendly heating pros are here to help with the best furnace repair in Lincoln.

1. Furnace Making a Banging Noise

You may have a critical issue on your hands if you’re detecting your furnace making a banging noise. If your furnace is making a knocking noise, it might indicate there could be a few problems. These range from gas accumulating in your furnace or a ductwork issue.

Banging Sounds Coming from Your Furnace

Your heating system turns filthy as time passes, so that’s why it’s critical to schedule seasonal furnace maintenance with AW Heating & Air Conditioning. One of the things our professionals complete during this work is clean your furnace’s burners. When this piece gets dirty, you might hear your furnace making a loud rumbling noise if ignition is delayed. The following gas buildup may fracture your furnace’s heat exchanger, where natural gas transforms into warm air. Any breaks in it can leak carbon monoxide, which is regularly released outdoors. This hazardous gas can be fatal in large concentrations.

If you’re aware of banging or knocking sounds coming from your furnace, AW Heating & Air Conditioning urges you to turn it off and contacting us at 402-318-5351. Significant natural gas in your furnace or a ruptured heat exchanger are critical troubles that necessitate prompt attention.

Banging Sounds Coming from Your Ductwork

Your furnace relies on ductwork to move warm air around your house. If the ductwork wasn’t designed properly or is getting dated, it can be noisy when your furnace is on. This might be the issue if your furnace makes a banging noise when it shuts off. Call AW Heating & Air Conditioning at 402-318-5351 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 typically indicates an electrical situation, like with its transformer, blower motor or capacitor.

Your furnace relies on an internal transformer to work on the proper 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 works with a blower motor, which distributes warm or cold air around your space, and a capacitor, which turns on the motor. If either of these components are fading, 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 due to something small, like an unsecure screw, or something serious, like a broken component. In either case, we recommend shutting off your furnace and calling our heating specialists at 402-318-5351 for assistance.

4. Furnace Making a Squealing Noise

If your furnace makes a high-pitched noise, like squealing, when it’s on, it’s making an effort to tell you it requires some TLC. If you’ve skipped furnace maintenance the last couple of years, belts could be dilapidated or a bearing might need to be lubed. We are aware that maintenance frequently slips your mind, but our professionals can get your furnace running quietly again rapidly.

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 may also hear whistling while the furnace is on if a floor vent is loose. If you’ve examined your vents but are still sensing whistling, AW Heating & Air Conditioning can provide support. It’s important to get loose ductwork fixed quickly, since it can result in comfort troubles in your house and inflate your heating costs.

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 racket usually means there’s a problem with your furnace’s blower. Switch off your furnace off instantly and contact us at 402-318-5351 for assistance.

When you’re hearing a strange noise from your furnace, AW Heating & Air Conditioning is here to support you. Contact us at 402-318-5351 to schedule your furnace repair appointment today.