Scary Furnace Noises You Shouldn't Ignore

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Do you hear strange noises coming from your furnace? Whether it’s a loud bang or a high-pitched squeal, you have every right to be alarmed. The temperatures are beginning to drop drastically, and there’s no reason for you to put up with scary sounds all fall and winter long. Besides, the noises you’re hearing from your furnace typically mean there’s a larger issue at hand that you should address.

3 Scary Furnace Noises You Shouldn't Ignore

Loud Bang or Boom

  • Gas buildup in your system - Do you hear what sounds like a loud gunshot when you turn on your furnace? This may mean that you have gas buildup in your system. This loud bang or boom sound could end up cracking the heat exchanger in your furnace (which is a costly repair), so call a professional ASAP.

  • Your dirty burners may have delayed the ignition - Dirty burners can delay the ignition, which causes gas to build up and “explode” when the ignition finally does come on. Scheduling maintenance will prevent this because a technician will come in and clean your burners as part of the tune-up appointment.

  • It may be expanding and contracting ducts - Loud duct noises are a common problem for homeowners with HVAC systems. Contact a professional to look at your unit — they’ll be able to seal and insulate your ducts, replace undersized ducts, adjust dampers, and replace your air filter.


  • Loose panel or loose screw - A rattling sound could often mean there’s a loose panel or loose screw in your furnace. Try tightening your panel with a screwdriver (after you’ve turned off the power from your electrical panel). If that doesn’t help the rattling noise, contact a professional.

  • Leak or crack in your heat exchanger - Faulty heat exchangers can be very serious and dangerous. It can end up leaking carbon monoxide into your home.

Squealing or Screeching

Squealing, screeching, whining, or whistling noises aren’t as big of a deal as banging, booming, or rattling noises. However, it’s still something you want to keep an ear out for. Squealing or screeching noises could mean you have a belt-driven motor loose or a damaged blower belt. It could also mean that certain moving parts in your system have become dry. All of the above can easily be repaired by a professional HVAC technician.

Heating Maintenance in Houston

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When it comes to furnace repairs, our team has experience servicing all equipment makes and models. Our highly skilled and knowledgeable technicians are equipped with all of the tools needed to get your furnace fully repaired and working better than ever.

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Ready to upgrade and install your furnace with a new and improved unit? As trusted experts of your indoor comfort, we'll thoroughly evaluate your property to determine the best heating solutions in alignment with your budget and individual needs. We'll also take the quality of your air into consideration to ensure that we recommend products and services that accommodate your desired level of comfort, and meet your energy savings goals.

Furnace Maintenance Checks

The sooner you take preventative measures to avoid future disasters, the better off you'll be. We can serve your furnace maintenance needs by scheduling an annual tune-up and safety inspection on your behalf. We’ll catch any glitches or malfunctions before they turn into costly breakdowns that occur at a time you need heating most. Schedule your heater maintenance today!

Other benefits of choosing AirCon Service Company includes:

  • Around-the-clock emergency assistance.

  • Experts who service all heating brands.

  • Repairs, maintenance, and installations.

  • The latest Lennox and American Standard products.

  • Wi-Fi-friendly thermostat systems.

  • Electric air cleaners.

  • Routine safety inspections and tune-ups.

  • Comprehensive heating services.

AirCon Service Company can help you and your loved ones stay cozy this winter. For heating services or maintenance checks in the Houston area, give us a call at 281.823.8771!