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

When your furnace is running like it should, it should deliver warmth without making too much noise. While it’s normal to hear your furnace making noise as it turns on, other sounds are signaling your furnace requires immediate professional support.

Here are some of the most common furnace noises and what they can be signaling. If your furnace is making an odd noise, our friendly heating professionals are here to assist with the best furnace repair in Manassas.

1. Furnace Making a Banging Noise

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

Banging Sounds Coming from Your Furnace

Your heating system becomes grimy as time passes, so that’s why it’s important to set annual furnace maintenance with Air-Right Energy Design, Inc.. One of the things our pros complete during this service is clean your furnace’s burners. When this part gets dirty, you might hear your furnace making a loud rumbling noise after ignition is delayed. The subsequent gas buildup might fracture your furnace’s heat exchanger, where natural gas turns into heat. Any cracks in it can discharge carbon monoxide, which is normally emitted outdoors. This dangerous gas can be lethal in large concentrations.

If you’re aware of banging or knocking sounds coming from your furnace, Air-Right Energy Design, Inc. recommends turning it off and reaching us at 703-260-1148. Significant natural gas in your furnace or a broken heat exchanger are dangerous troubles that should get prompt service.

Banging Sounds Coming from Your Ductwork

Your furnace works with ductwork to move heated air across your house. If the ductwork wasn’t put in correctly or is getting old, it can make a lot of noise when your furnace is on. This could be the issue if your furnace makes a banging noise when it shuts off. Call Air-Right Energy Design, Inc. at 703-260-1148 and we’ll figure out 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 often indicates an electrical problem, like with its transformer, blower motor or capacitor.

Your furnace relies on an internal transformer to operate on the proper voltage. If wires or the box needs to be tightened, you may notice a low humming noise in the furnace when off. Your furnace also uses a blower motor, which sends warm or cold air around your house, and a capacitor, which triggers the motor. If either of these pieces are failing, 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 due to something small, like a loose screw, or something major, like a broken part. In either case, we urge you to shut your furnace off and getting in touch with our heating specialists at 703-260-1148 for help.

4. Furnace Making a Squealing Noise

If your furnace makes a high-pitched noise, like squealing, when it’s heating, it’s trying to tell you it could use some TLC. If you’ve forgotten furnace maintenance the last couple of years, belts could be dilapidated or a bearing could need to be lubricated. We are aware that maintenance frequently slips your mind, but our techs can get your furnace running quietly again fast.

5. Furnace Making a Whistling Noise

When you’re hearing your furnace making a whistling noise, it’s frequently because of an air leak in your ductwork. You could also be aware of whistling while the furnace is running if a floor vent isn’t secure. If you’ve examined your vents but are still hearing noise, Air-Right Energy Design, Inc. can provide support. It’s important to get loose ductwork taken care of fast, because it can make comfort problems in your home and inflate your utility 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 noise usually means there’s trouble with your furnace’s blower. Shut down your furnace off promptly and contact our professionals at 703-260-1148 for assistance.

When you’re hearing an atypical noise from your furnace, Air-Right Energy Design, Inc. is ready to support you. Contact us at 703-260-1148 to book your furnace repair appointment today.

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