Why Your Furnace May Be Making These Noises

November 23, 2016

This is the time of year homeowners start turning on their furnaces to settle in for a long winter. Unfortunately, when some heaters start up, especially if it hasn’t had a fall heating tune-up, there are some issues that need to be examined. A major problem you may discover is your furnace making weird noises – read about these furnace noises you should never neglect.

Scraping Sound

If you hear a loud raking noise that sounds like metal on metal, there is likely something faulty with the blower wheel. If you hear something like this, turn off your furnace immediately and call Komfort Air Service Experts to inspect the equipment. There are a few things that could be amiss with the blower wheel. First, it could just be loose and if the part is not too harmed, can be tightened. Second, it could be that the blower wheel is broken and in need of replacement. Or third, it may be that the motor mount itself broke, causing the whole blower assembly to rattle uncontrollably. One of our service professionals would be happy to come over and take a look, and get you back to the silent and comfortable home you have come to expect.

Loud Bang When Furnace Starts

If there is a loud pop when your furnace turns on, there are a few things that could be happening. Two general issues are a dirty furnace burner or ignitor. Extending and contracting air ducts can also cause loud bangs after the heating blower turns on. A filthy furnace burner or ignitor could holdup the burners from igniting, forcing gas to build up. When the gas does finally ignite, it will create the loud boom you hear. This could cause a safety issue, especially if one of those small explosions caused the heat exchanger to break. Not only could that cause a carbon monoxide leak, but you’d end up having to replace the heat exchanger, which may be very expensive.

The other problem, stretching and contracting air ducts, is a typical noise complaint for people with metal ducts. If your system is making the loud boom and it is a result of your air ducts, it could be an indication of undersized ducts, obstructed vents, or a clogged air filter. Komfort Air Service Experts is happy to come out to diagnose your problem and get your home back to order. Ultimately, this will also provide improved comfort as well.

Whining Noise

If you hear a high-pitched noise, it could be the shaft bearings are in need of oil, there is an issue with the blower belt, or the blower motor is malfunctioning. A routine furnace tune-up will help discover these issues before they become major problems so make sure you call us at 704-705-8135 and we’ll make sure your heating system is ready to keep you safe and warm all winter long.

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