Why Your Furnace May Be Making These Noises

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 had a yearly heating tune-up, there are some troubles that need to be examined. A major problem you may discover is your furnace making unusual noises – check out these furnace noises you should never ignore. 

Scraping Sound 

If you hear a loud scraping racket that sounds like metal on metal, there is likely something defective with the blower wheel. If you hear something like this, turn off your furnace right away and call Stevenson Service Experts to inspect the equipment. There are a few things that could be wrong with the blower wheel. First, it could just be loose and if the component is not too impaired, can be tightened. Second, it may be that the blower wheel is broken and will require replacement. Or third, it might be that the motor mount itself broke, causing the complete blower assembly to shake uncontrollably. One of our service professionals would be happy to come out and take a look, and get you back to the noiseless and cozy home you have come to love. 

Loud Bang When Furnace Starts 

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

The other issue, expanding and contracting air ducts, is a common noise complaint for homes with metal ducts. If your furnace is making the loud bang and it is caused by your air ducts, it could be a sign of undersized ducts, obstructed vents, or a clogged air filter. Stevenson Service Experts is happy to come out to diagnose your issue and get your home back to order. Ultimately, this will also give you improved comfort as well. 

Whining Noise 

If you hear a whining sound, 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 contact us at 614-334-3192 and we’ll make sure your heating system is ready to keep you safe and comfortable all winter long. 

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