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

When your furnace is working correctly, it should deliver warmth without generating too much disruption. While it’s common to hear your furnace making noise as it turns on, other noises are signaling your furnace needs immediate professional assistance.

Here are some of the most frequent furnace noises and what they might be signaling. If your furnace is making a weird noise, our friendly heating professionals are here to help with the best furnace repair in Carson City.

1. Furnace Making a Banging Noise

You may have a critical issue 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 a few problems. These include gas increasing in your furnace or a ductwork problem.

Banging Sounds Coming from Your Furnace

Your heating system turns grimy over time, so that’s why it’s essential to set seasonal furnace maintenance with Anderson Heating & A/C. One of the jobs our techs perform during this work is clean your furnace’s burners. When this component gets dirty, you may hear your furnace making a loud rumbling noise when ignition takes more time. The ensuing gas buildup can break your furnace’s heat exchanger, where natural gas transforms into heat. Any breaks in it can emit carbon monoxide, which is normally vented away from your home. This toxic gas can be fatal in large concentrations.

If you’re hearing banging or knocking sounds coming from your furnace, Anderson Heating & A/C recommends turning it off and reaching us at 775-230-7628. Significant natural gas in your furnace or a ruptured heat exchanger are dangerous problems that should get prompt repairs.

Banging Sounds Coming from Your Ductwork

Your furnace relies on ductwork to move hot air across your house. If the ductwork wasn’t designed right or is getting dated, it can be loud when your furnace is on. This might be the issue if your furnace makes a banging noise when it shuts off. Call Anderson Heating & A/C at 775-230-7628 and we’ll determine the problem.

2. Furnace Making a Buzzing Noise

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

Your furnace depends on an internal transformer to work 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 has a blower motor, which distributes hot or cold air across your home, 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 can 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 contacting our heating professionals at 775-230-7628 for support.

4. Furnace Making a Squealing Noise

If your furnace makes a high-pitched noise, like squealing, when it’s going, it’s attempting to get your attention it could use some TLC. If you’ve neglected furnace maintenance the last couple of years, belts could be worn down or a bearing could need to be lubricated. We know that maintenance often slips your mind, but our techs can get your furnace heating quietly again quickly.

5. Furnace Making a Whistling Noise

When you’re hearing your furnace making a whistling noise, it’s likely because of an air leak in your ductwork. You might also be aware of whistling while the furnace is on if a floor vent is loose. If you’ve checked your vents but are still noticing sound, Anderson Heating & A/C can help. It’s important to get loose ductwork repaired fast, as it can make comfort issues in your home and increase your energy costs.

6. Furnace Making a Grinding Noise

It’s not an encouraging sign if you hear your furnace making a grinding noise. This metal-on-metal sound typically means there’s a problem with your furnace’s blower. Turn off your furnace off instantly and call us at 775-230-7628 for support.

When you’re hearing an atypical noise from your furnace, Anderson Heating & A/C is available to provide assistance. Contact us at 775-230-7628 to book your furnace repair appointment right away.

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