Why Your Furnace May Be Making These Noises

November 23, 2016

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

Scraping Sound

If you hear a loud raking sound that sounds like metal on metal, there is likely something wrong with the blower wheel. If you hear a sound like this, turn off your furnace immediately and call Service Experts Heating & Air Conditioning to inspect the furnace. There are a couple things that could be wrong with the blower wheel. First, it might just be loose and if the part is not too damaged, can be tightened. Second, it might 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 complete blower assembly to vibrate uncontrollably. One of our service technicians would be happy to come over and take a look, and get you back to the silent and cozy home you have come to love.

Loud Bang When Furnace Starts

If there is a loud pop when your furnace kicks on, there are a few things that could be happening. Two typical things are a dirty furnace burner or ignitor. Expanding and contracting air ducts can also create loud sounds after the heating system blower starts up. A filthy furnace burner or ignitor could delay the burners from igniting, causing gas to build up. When the gas finally ignites, it will create the loud boom you hear. This could result in a safety issue, especially if one of those small explosions caused the heat exchanger to break. Not only could that cause a carbon monoxide leak, but you will have to replace the heat exchanger, which may be very pricey.

The other trouble, expanding and contracting air ducts, is a common noise complaint for homes with metal ducts. If your system is making the loud pop and it is caused by your air ducts, it could be an indication of undersized ducts, obstructed vents, or a clogged air filter. Service Experts Heating & Air Conditioning is happy to visit your home to diagnose your problem and get your home back in working order. Also, this will also give you improved comfort as well.

Whining Noise

If you hear a squealing 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. A seasonal heating tune-up will help discover these issues before they become big problems so make sure you contact us at 704-464-4307 and we’ll make sure your heating equipment is ready to keep you safe and warm all winter long.

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