It’s natural for your home’s furnace to make some sounds during operation. After all, the system works hard when producing enough heat to warm your entire home. Nonetheless, there are some sounds that could indicate a problem. Understanding what to listen for helps homeowners act promptly in case something goes wrong, which could aid in catching a problem before it worsens.

3 Furnace Sounds Demanding Prompt Attention

1. Loud Bangs or Booms

You’ll likely hear some noise coming from your furnace when it first kicks on, but it should never sound like a loud bang or boom. If this occurs, it could indicate a gas buildup, in which a burst of flame is created upon ignition. Because the flame is larger than it needs to be, the problem is potentially dangerous and could lead to a cracked heat exchanger. Turn off your system before calling a heating repair professional.

2. Metal on Metal

Another sound indicating a possible malfunction is loud scraping, which usually indicates metal-on-metal rubbing. Not only is this sound (which can resemble nails on a chalkboard) exceptionally irritating, but it can also point to a serious problem with your system. There are a few potential causes, including a loose or broken blower wheel or a broken motor mount. You should also shut off your heating system immediately after hearing loud scraping.  

3. High-Pitched Squeals

Lastly, homeowners may sometimes hear a high-pitched squealing or whining noise coming from their furnace if the blower belt needs repair. While it’s possible the blower belt may have just slipped out of place, it may also need to be replaced if it’s fraying or otherwise damaged. There’s also a chance the system’s shaft belt needs lubrication, or the blower motor needs a repair. 

If you notice these or any other strange noises coming from your furnace, don’t wait to call the HVAC repair experts from Steve’s Plumbing & Heating. Serving Wisconsin Rapids, Marshfield, Stevens Point, and the surrounding areas in Wisconsin, their team offers 24-hour emergency service, along with preventive maintenance. Call (715) 421-1800 to speak with one of their helpful associates, or check out the website to learn more.