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

When your furnace is operating like it should, it should deliver warm air without generating too much disruption. While it’s normal to notice your furnace making noise as it starts up, other disruptions are showing your furnace should get immediate professional help.

Here are some of the most frequent furnace noises and what they could be signaling. If your furnace is making an atypical noise, our friendly heating specialists are here to help with the best furnace repair in Menomonie and western Wisconsin.

1. Furnace Making a Banging Noise

You may have a serious problem on your hands if you’re detecting your furnace making a banging noise. If your furnace is making a knocking noise, it can mean there could be a couple of problems. These include gas accumulating in your furnace or a ductwork situation.

Banging Sounds Coming from Your Furnace

Your heating system becomes dirty over time, so that’s why it’s important to book seasonal furnace maintenance with Halverson Brothers Inc. One of the tasks our technicians do during this service is clean your furnace’s burners. When this part gets grubby, you might hear your furnace making a loud rumbling noise when ignition takes longer than normal. The ensuing gas buildup might fracture your furnace’s heat exchanger, where natural gas changes into warmth. Any cracks in it can discharge carbon monoxide, which is normally vented away from your home. This dangerous gas can be deadly in large concentrations.

If you’re hearing banging or knocking sounds coming from your furnace, Halverson Brothers Inc recommends turning it off and calling us at 715-352-4052. Too much natural gas in your furnace or a cracked heat exchanger are dangerous problems that should get prompt service.

Banging Sounds Coming from Your Ductwork

Your furnace uses ductwork to deliver warm air throughout your residence. If the ductwork wasn’t installed right or is getting old, it can be noisy when your furnace is heating. This might be the issue if your furnace makes a banging noise when it shuts off. Get in touch with Halverson Brothers Inc at 715-352-4052 and we’ll pinpoint the problem.

2. Furnace Making a Buzzing Noise

If you notice your furnace making a buzzing noise, don’t delay calling us. A buzzing sound often is telling you there’s an electrical problem, like with its transformer, blower motor or capacitor.

Your furnace relies on an internal transformer to work on the correct voltage. If wires or the box is loose, you might notice a low humming noise in the furnace when off. Your furnace also has a blower motor, which sends warm or cold air throughout your house, 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 might be related to something small, 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 pros at 715-352-4052 for support.

4. Furnace Making a Squealing Noise

If your furnace makes a high-pitched noise, like squealing, when it’s running, it’s trying to tell you it needs some TLC. If you’ve skipped furnace maintenance the past few years, belts could be dilapidated or a bearing may need to be greased. We know that maintenance often slips your mind, but our techs 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 could also hear whistling while the furnace is running if a floor vent is loose. If you’ve looked at your vents but are still sensing noise, Halverson Brothers Inc can help. It’s critical to get loose ductwork repaired without delay, as it can make comfort troubles in your home and increase your utility costs.

6. Furnace Making a Grinding Noise

It’s not a good sign if you detect your furnace making a grinding noise. This metal-on-metal racket often means there’s a problem with your furnace’s blower. Shut down your furnace off instantly and reach our professionals at 715-352-4052 for assistance.

When you’re getting a strange noise from your furnace, Halverson Brothers Inc is here to provide assistance. Contact us at 715-352-4052 to request your furnace repair appointment right away.

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