Why Your Furnace May Be Making These Noises

November 23, 2016

It’s that time of year when people start turning on their heaters to settle in for a frigid winter. Unfortunately, when some furnaces start up, especially if it hasn’t had a fall heating tune-up, there are some problems that need to be examined. A major problem you may run into is your furnace making weird noises – check out these furnace noises you should never neglect.

Scraping Sound

If you hear a loud scraping sound that sounds like metal on metal, there is likely something faulty with the blower wheel. If you hear a sound like this, shut off your furnace right away and call Knochelmann Service Experts Heating & Air Conditioning 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 component is not too damaged, can be tightened. Second, it may be that the blower wheel is broken and needs to be replaced. Or third, it could 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 to your home and take a look, and get you back to the quiet and cozy home you have come to expect.

Loud Bang When Furnace Starts

If there is a loud boom when your furnace comes on, there are a couple things that could be occurring. Two typical things are a dirty furnace burner or ignitor. Extending and contracting air ducts can also produce loud noises after the heating blower turns on. A soiled 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 end up being a safety issue, especially if one of those small explosions caused the heat exchanger to break. Not only could that produce a carbon monoxide leak, but you’d end up having to replace the heat exchanger, which can be very costly.

The other issue, stretching and contracting air ducts, is a typical noise complaint for homes with metal ducts. If your system is making the loud bang and it is caused by your air ducts, it could be an indication of undersized ducts, blocked vents, or a clogged air filter. Knochelmann Service Experts Heating & Air Conditioning is happy to come out to diagnose your trouble and get your home back in shape for the winter. Additionally, this will also give you improved comfort as well.

Whining Noise

If you hear a whining 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 system tune-up will help discover these issues before they become major problems so make sure you contact us at 859-905-0834 and we’ll make sure your furnace is ready to keep you safe and comfortable all winter long.

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