Why Your Furnace May Be Making These Noises

November 23, 2016

This is the time of year people start turning on their heating systems to settle in for a cold winter. Unfortunately, when some heaters start up, especially if it hasn’t undergone a seasonal heating tune-up, there are some problems that need to be examined. A major problem you may run into is your furnace making funny noises – check out these furnace noises you should never ignore.

Scraping Sound

If you hear a loud raking sound that sounds like metal on metal, there is possibly something wrong with the blower wheel. If you hear a sound like this, turn off your furnace right away and call Service Experts Heating & Air Conditioning to inspect the furnace. There are multiple things that could be wrong with the blower wheel. First, it might just be loose and if the component is not too damaged, can be tightened. Second, it might be that the blower wheel is broken and in need of replacement. Or third, it may 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 quiet and warm home you have come to adore.

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 happening. Two typical problems are a dirty furnace burner or ignitor. Extending and contracting air ducts can also create loud noises after the furnace blower comes on. A soiled furnace burner or ignitor could holdup the burners from igniting, forcing gas to build up. When the gas does finally ignite, it will create the loud boom 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 cause a carbon monoxide leak, but you’d end up having to replace the heat exchanger, which may be very expensive.

The other problem, stretching and contracting air ducts, is a usual noise complaint for people with metal ducts. If your furnace is making the loud bang and it is a result of your air ducts, it could be a sign of undersized ducts, blocked vents, or a clogged air filter. Service Experts Heating & Air Conditioning is happy to set up an appointment to diagnose your trouble and get your home back in working order. Additionally, this will also provide 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. A routine furnace tune-up will help find these issues before they become major problems so make sure you contact us at 901-235-1196 and we’ll make sure your furnace is ready to keep you safe and cozy all winter long.

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