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

When your furnace is operating like it should, it should provide warmth without making too much noise. While it’s normal to catch your furnace making noise as it begins running, other disruptions are indicating your furnace requires immediate professional help.

Here are some of the most reported furnace noises and what they could be indicating. If your furnace is making a strange noise, our friendly heating professionals are here to fix the problem with the best furnace repair in Lake Forest.

1. Furnace Making a Banging Noise

You might have an urgent situation on your hands if you’re hearing your furnace making a banging noise. If your furnace is making a knocking noise, it may mean there could be a few problems. These range from gas increasing in your furnace or a ductwork situation.

Banging Sounds Coming from Your Furnace

Your heating system gets dirty over time, so that’s why it’s critical to set seasonal furnace maintenance with 1st Choice Heating & Air Conditioning, Inc.. One of the tasks our technicians complete during this service is clean your furnace’s burners. When this part gets grubby, you could hear your furnace making a loud rumbling noise when ignition takes more time. The ensuing gas buildup can crack your furnace’s heat exchanger, where natural gas changes into heat. Any fractures in it can discharge carbon monoxide, which is regularly vented outside. This hazardous gas can be deadly in large concentrations.

If you’re hearing banging or knocking sounds coming from your furnace, 1st Choice Heating & Air Conditioning, Inc. advises turning it off and reaching us at 949-204-0859. Excessive natural gas in your furnace or a broken heat exchanger are serious issues that should get prompt repairs.

Banging Sounds Coming from Your Ductwork

Your furnace works with ductwork to provide heated air around your residence. If the ductwork wasn’t installed correctly or is aging, it can be noisy when your furnace runs. This may be the problem if your furnace makes a banging noise when it shuts off. Call 1st Choice Heating & Air Conditioning, Inc. at 949-204-0859 and we’ll pinpoint 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 often indicates an electrical problem, 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 is loose, you may hear a low humming noise in the furnace when off. Your furnace also works with a blower motor, which sends heated or cold air throughout your home, and a capacitor, which turns on the motor. If either of these parts 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 could be related to something minor, like an unsecure screw, or something serious, like a broken piece. In either case, we recommend shutting off your furnace and calling our heating professionals at 949-204-0859 for help.

4. Furnace Making a Squealing Noise

If your furnace makes a high-pitched noise, like squealing, when it’s on, it’s trying to alert you it requires some TLC. If you’ve forgotten furnace maintenance the past few years, belts could be worn out or a bearing could need to be lubricated. We know that maintenance often slips your mind, but our pros can get your furnace operating quietly again fast.

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 might also be aware of whistling while the furnace is on if a floor vent isn’t tight. If you’ve checked your vents but are still sensing whistling, 1st Choice Heating & Air Conditioning, Inc. can provide support. It’s essential to get loose ductwork repaired quickly, because it can result in comfort issues in your residence and inflate your gas expenses.

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 frequently means there’s an issue with your furnace’s blower. Switch off your furnace off now and call us at 949-204-0859 for assistance.

When you’re hearing a strange noise from your furnace, 1st Choice Heating & Air Conditioning, Inc. is available to help. Contact us at 949-204-0859 to book your furnace repair appointment now.

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