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

When your furnace is working correctly, it should give warm air without generating too much disruption. While it’s normal to notice your furnace making noise as it begins running, other sounds are indicating your furnace needs immediate professional support.

Here are some of the most common furnace noises and what they can be indicating. If your furnace is making a weird noise, our friendly heating professionals are here to fix the problem with the best furnace repair in Moline.

1. Furnace Making a Banging Noise

You might have an urgent issue on your hands if you’re hearing your furnace making a banging noise. If your furnace is making a knocking noise, it may indicate there could be a couple of problems. These involve gas increasing in your furnace or a ductwork issue.

Banging Sounds Coming from Your Furnace

Your heating system gets dirty over the years, so that’s why it’s critical to set routine furnace maintenance with Freed Heating & Air Conditioning. One of the jobs our professionals do during this work is clean your furnace’s burners. When this piece gets dirty, you might hear your furnace making a loud rumbling noise after ignition takes longer than normal. The ensuing gas buildup may fracture your furnace’s heat exchanger, where natural gas turns 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 hearing banging or knocking sounds coming from your furnace, Freed Heating & Air Conditioning urges you to turn it off and calling us at 309-323-9584. Significant natural gas in your furnace or a broken heat exchanger are hazardous issues that require prompt attention.

Banging Sounds Coming from Your Ductwork

Your furnace relies on ductwork to provide heated air across your residence. If the ductwork wasn’t put in right or is getting dated, it can be noisy when your furnace is heating. This can be the case if your furnace makes a banging noise when it shuts off. Get in touch with Freed Heating & Air Conditioning at 309-323-9584 and we’ll pinpoint the problem.

2. Furnace Making a Buzzing Noise

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

Your furnace depends on an internal transformer to operate on the correct voltage. If wires or the box needs to be tightened, you may detect a low humming noise in the furnace when off. Your furnace also has a blower motor, which sends hot or cooled air across your home, and a capacitor, which triggers the motor. If either of these components are failing, they will buzz when the furnace turns on.

3. Furnace Making a Rattling Noise

If your furnace is making a rattling noise, it could be due to something minor, like an unsecure screw, or something serious, like a broken piece. In either case, we advise shutting your furnace off and calling our heating pros at 309-323-9584 for assistance.

4. Furnace Making a Squealing Noise

If your furnace makes a high-pitched noise, like squealing, when it’s going, it’s trying to tell you it requires some TLC. If you’ve skipped furnace maintenance the last couple of years, belts could be worn out or a bearing might need to be greased. We realize that maintenance sometimes slips your mind, but our techs can get your furnace operating quietly again quickly.

5. Furnace Making a Whistling Noise

When you’re hearing your furnace making a whistling noise, it’s typically due to an air leak in your ductwork. You might also notice whistling while the furnace is on if a floor vent isn’t tight. If you’ve checked your vents but are still sensing sound, Freed Heating & Air Conditioning can provide support. It’s critical to get loose ductwork fixed fast, as it can result in comfort problems in your residence and increase your gas bills.

6. Furnace Making a Grinding Noise

It’s not a good sign if you hear your furnace making a grinding noise. This metal-on-metal sound usually means there’s an issue with your furnace’s blower. Turn off your furnace off now and contact our pros at 309-323-9584 for support.

When you’re noticing an uncommon noise from your furnace, Freed Heating & Air Conditioning is ready to support you. Contact us at 309-323-9584 to request your furnace repair appointment right away.

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