Why Your Furnace May Be Making These Noises

November 23, 2016

It’s that time of year when homeowners start turning on their furnaces to settle in for a long winter. Unfortunately, when some furnaces start up, especially if it hasn’t received 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 sound 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 ASAP and call Komfort Air to inspect the equipment. There are a few things that could be wrong with the blower wheel. First, it may 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 needs to be replaced. Or third, it may be that the motor mount actually 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 quiet and comfortable home you have come to expect.

Loud Bang When Furnace Starts

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

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 a sign of undersized ducts, obstructed vents, or a clogged air filter. Komfort Air is happy to visit your home to diagnose your problem and get your home back to order. Ultimately, this will also result in improved comfort as well.

Whining Noise

If you hear a high-pitched noise, it could be the blower belt, shaft bearings in need of oil, or even a malfunctioning blower motor. An annual heating 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 comfortable all winter long.

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