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

When your furnace is operating properly, it should provide heat without making too much sound. While it’s expected to catch your furnace making noise as it starts up, other noises are showing your furnace should get immediate professional support.

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

1. Furnace Making a Banging Noise

You could have a critical problem on your hands if you’re hearing your furnace making a banging noise. If your furnace is making a knocking noise, it might mean there could be a few problems. These involve gas increasing in your furnace or a ductwork issue.

Banging Sounds Coming from Your Furnace

Your heating system turns grimy over the years, so that’s why it’s critical to set routine furnace maintenance with Clean Air HVAC. One of the jobs our professionals do during this service is clean your furnace’s burners. When this component gets grubby, you might hear your furnace making a loud rumbling noise if ignition is delayed. The ensuing gas buildup might crack your furnace’s heat exchanger, where natural gas changes into warmth. Any fractures in it can discharge carbon monoxide, which is regularly released away from your home. This dangerous gas can be lethal in large concentrations.

If you’re aware of banging or knocking sounds coming from your furnace, Clean Air HVAC advises turning it off and calling us at 925-233-6238. Significant natural gas in your furnace or a broken heat exchanger are hazardous troubles that require fast attention.

Banging Sounds Coming from Your Ductwork

Your furnace works with ductwork to provide heated air around your home. If the ductwork wasn’t designed correctly or is aging, it can be loud when your furnace is heating. This could be the issue if your furnace makes a banging noise when it shuts off. Get in touch with Clean Air HVAC at 925-233-6238 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 indicates an electrical situation, like with its transformer, blower motor or capacitor.

Your furnace relies on an internal transformer to operate on the correct voltage. If wires or the box isn’t tight enough, you could notice a low humming noise in the furnace when off. Your furnace also has a blower motor, which distributes heated or cold air around your rooms, and a capacitor, which starts the motor. If either of these components are going out, they will buzz when the furnace switches on.

3. Furnace Making a Rattling Noise

If your furnace is making a rattling noise, it may be due to something minor, like a loose screw, or something major, like a broken part. In either case, we recommend shutting off your furnace and getting in touch with our heating specialists at 925-233-6238 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 alert you it requires some TLC. If you’ve forgotten furnace maintenance recently, belts could be worn out or a bearing may need to be lubricated. We know that maintenance sometimes slips your mind, but our technicians can get your furnace operating quietly again rapidly.

5. Furnace Making a Whistling Noise

When you’re detecting your furnace making a whistling noise, it’s likely the result of an air leak in your ductwork. You could also hear whistling while the furnace is on if a floor vent isn’t secure. If you’ve looked at your vents but are still noticing noise, Clean Air HVAC can help. It’s critical to get loose ductwork taken care of fast, because it can result in comfort issues in your home and drive up your heating 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 frequently means there’s an issue with your furnace’s blower. Turn off your furnace off now and contact our pros at 925-233-6238 for support.

When you’re hearing an uncommon noise from your furnace, Clean Air HVAC is available to support you. Contact us at 925-233-6238 to schedule your furnace repair appointment today.

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