Scary Furnace Sounds You Should Never Ignore

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Scary Furnace Sounds You Should Never Ignore

If you have kids, I bet they’re getting excited, aren’t they? That’s because the spookiest of holidays — Halloween — is upon us. Everyone loves the costumes, candy, and spooky haunted houses. A big part of the celebrations are scary sounds. What you don’t want to hear is scary sounds coming from the furnace in your Illinois or Northwest Indiana home, especially since winter weather comes quickly after Halloween is gone. Merts Heating & Air Conditioning specializes in maintenance, repairs, and replacement to prevent any HVAC horrors, so read on to see what kind of noises you shouldn’t ignore.


Everyone understands furnaces make noise as they move air throughout the house. It’s the scary furnace sounds that can be warning signs that shouldn’t be ignored. Common examples include:

  • Metal-on-Metal. When you hear scraping or clanking it could mean issues with the blower wheel or the fan may have come loose or is broken. Whatever is causing the sound, any indication of metal-on-metal contact needs immediate attention.
  • Banging/Booming. If dirt accumulates on the burner, it can delay ignition. This results in a gas buildup that in turn causes a loud bang or boom when it finally ignites. Don’t let this problem continue because it can damage the heat exchanger and allow deadly carbon monoxide poisoning in your Steger, IL or Crown Point, IN home. And that’s a real HVAC horror story.
  • High-Pitched Squealing/Screeching/Whining. These high-pitched noises will certainly get your attention. There can be a variety of causes such as a loose blower fan belt, loose/vibrating shaft bearings, bearings that are worn out or other issues with the blower motor. It may not be as serious as some other noises but waiting too long can certainly cause more serious damage.


You can depend on Merts Heating & Air Conditioning to make sure the only scary sounds you hear this Halloween are coming from partygoers and trick or treaters. We do that by providing professional HVAC maintenance for homes in Steger, IL and Crown Point, IN — something Merts has been doing with quality and honesty since 1952. To learn more about the services Merts offers be sure to like us on Facebook and follow us on Twitter for more great information like this.