Why Your Furnace May Be Making These Noises

November 23, 2016

Now is when families start turning on their furnaces to settle in for a long winter. Unfortunately, when some heating systems start up, especially if it hasn’t undergone a yearly heating tune-up, there are some problems that need to be examined. A major problem you may discover is your furnace making unusual noises – take a look at these furnace noises you should never disregard.

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 a noise like this, turn off your furnace ASAP and call Service Experts Heating & Air Conditioning to inspect the system. There are multiple things that could be amiss with the blower wheel. First, it might just be loose and if the piece is not too harmed, can be tightened. Second, it might be that the blower wheel is broken and will require replacement. Or third, it might be that the motor mount is what broke, causing the complete blower assembly to shake uncontrollably. One of our service technicians would be happy to come out and take a look, and get you back to the silent and warm 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 few things that could be going on. Two typical things are a dirty furnace burner or ignitor. Expanding and contracting air ducts can also cause loud bangs after the heating system blower starts up. A filthy furnace burner or ignitor could holdup the burners from igniting, causing gas to build up. When the gas finally does ignite, it will create the loud bang you hear. This could result in 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 would also have to replace the heat exchanger, which can be very pricey.

The other problem, expanding and contracting air ducts, is a usual noise complaint for people with metal ducts. If your furnace is making the loud boom and it is produced by your air ducts, it could be a sign of undersized ducts, obstructed vents, or a clogged air filter. Service Experts Heating & Air Conditioning is happy to set up an appointment to diagnose your issue and get your home back in working order. Also, this will also give you 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 seasonal heating tune-up will help discover these issues before they become big problems so make sure you contact us at 866-397-3787 and we’ll make sure your heating equipment is ready to keep you safe and cozy all winter long.

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