Why Your Furnace May Be Making These Noises

November 23, 2016

It’s that time of year when families start turning on their heating systems to settle in for a cold winter. Unfortunately, when some furnaces start up, especially if it hasn’t undergone a fall heating tune-up, there are some troubles that need to be inspected. A big problem you may discover is your furnace making funny noises – check out these furnace noises you should never disregard.

Scraping Sound

If you hear a loud scratching noise that sounds like metal on metal, there is likely something wrong with the blower wheel. If you hear a sound like this, shut off your furnace right away and call BW/Cook Service Experts Heating & Air Conditioning to inspect the furnace. There are multiple things that could be amiss with the blower wheel. First, it could just be loose and if the piece is not too damaged, 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 is what broke, causing the complete blower assembly to shake 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 handful of things that could be occurring. Two common 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 soiled furnace burner or ignitor could holdup the burners from igniting, resulting in 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 the small explosions caused the heat exchanger to deteriorate. Not only could that cause a carbon monoxide leak, but you would also have to replace the heat exchanger, which may be very expensive.

The other issue, stretching and contracting air ducts, is a typical noise complaint for people with metal ducts. If your equipment is making the loud boom and it is caused by your air ducts, it could be a sign of undersized ducts, obstructed vents, or a clogged air filter. BW/Cook Service Experts Heating & Air Conditioning is happy to set up an appointment to diagnose your issue and get your home back to order. Additionally, this will also provide improved comfort as well.

Whining Noise

If you hear a high-pitched disturbance, 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. An annual heating tune-up will help discover these issues before they become major problems so make sure you give us a call at 574-218-6404 and we’ll make sure your heating equipment is ready to keep you safe and warm all winter long.

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