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Five Reasons Your Furnace is Making Noise

The majority of mechanical equipment makes some noise when it works. Although furnaces aren’t an exception, they shouldn’t be particularly noisy.

Loud and unexpected noises from your furnace, such as scraping, pounding, whistling, and popping, could indicate a loose component, damaged heat exchanger, or unclean gas burners.

In this blog, technicians from Prime Genius mentioned some typical furnace noises and their most likely causes.

Furnace making noise
Two furnaces

Noises of Scraping

If your furnace makes a scraping sound, your ball bearings may be worn out. On the other hand, the blower wheel might have come loose as well. Switching off the heat and contact us for an effective fix.

The Noises of Banging and Popping

When warm air strikes cold metal in ducts, generating expansion, soft popping noises are often expected. However, the burners are probably unclean if your furnace makes many popping noises. Your heat exchanger will develop cracks if this is left unattended and will accumulate gas.

Buzzing Noises

A heating system should typically emit a mild hum when it is operating. A loud hum could signal a capacitor or fan issue, reducing your heater’s capacity to conserve energy.

Whistling Noises

A blocked air filter may cause the whistling sound to come from your furnace. Try replacing your air filter and listen to see if the eerie sound disappears. 

Shrill Sounds

A high-pitched screeching sound coming from your furnace is a sign that there is something wrong with the motor, like a worn belt. With the right tools and equipment, an issue can be quickly fixed if it is identified in its early stages. Before your furnace develops more severe problems, have the belt repaired by a qualified technician from Prime Genius Inc.

If your furnace has any of the mentioned issues, call us at 916-400-0442 to fix the problem.

Prime Genius Heating and Air Conditioning is a well-known and well-reputed company for repairing and delivering heating, air conditioning, appliance, or appliance repair or installation services on residential or commercial properties.


  • Wow, I never knew that buzzing noises from a furnace can end up being caused by a lot of different issues. This really makes me think that there is something already happening to our unit as every time my wife tries to turn it on she complains about this high-pitched sound that annoys her. I’ll make sure no one turns that furnace on until we find an HVAC contractor that can fix it.

    • Thank you for taking the time to read our blog post and leave a comment! We’re glad to hear that our post was informative for you. We understand that a high-pitched sound coming from your furnace can be very annoying and may indicate that there is an issue with your unit. It’s a good idea to avoid using the furnace until you have it inspected by an HVAC contractor, as this can help prevent further damage and potential safety hazards. At Prime Genius Heating, Air & Appliances, we offer professional furnace repair and maintenance services to help keep your furnace running smoothly and efficiently. Please don’t hesitate to give us a call at 916-400-0442 if you need any assistance with your furnace. We’d be happy to help!

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