Why Your Furnace May Be Making These Noises

November 23, 2016

This is the time of year homeowners 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 issues that need to be examined. A serious 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 defective with the blower wheel. If you hear a noise like this, shut 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 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 may be that the motor mount actually broke, causing the whole blower assembly to shake 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 adore.

Loud Bang When Furnace Starts

If there is a loud bang when your furnace kicks 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 cause 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 bang you hear. This could end up being a safety issue, especially if one of the small explosions caused the heat exchanger to crack. 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 homeowners with metal ducts. If your furnace is making the loud bang and it is a result of your air ducts, it could be an indication 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. Ultimately, this will also result in improved comfort as well.

Whining Noise

If you hear a squealing 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 heating tune-up will help catch these issues before they become big problems so make sure you give us a call at 901-235-1196 and we’ll make sure your heating system is ready to keep you safe and cozy all winter long.

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