Why Your Furnace May Be Making These Noises

November 23, 2016

This is the time of year families start turning on their heaters to settle in for a frigid winter. Unfortunately, when some heating systems start up, especially if it hasn’t had a fall heating tune-up, there are some problems that need to be examined. A big problem you may discover is your furnace making weird noises – check out these furnace noises you should never disregard.

Scraping Sound

If you hear a loud scraping racket that sounds like metal on metal, there is likely something defective with the blower wheel. If you hear something like this, turn off your furnace immediately and call Service Experts Heating & Air Conditioning to inspect the system. There are a couple things that could be faulty with the blower wheel. First, it may just be loose and if the piece is not too damaged, can be tightened. Second, it might be that the blower wheel is broken and will require replacement. Or third, it might be that the motor mount is what broke, causing the whole blower assembly to shake uncontrollably. One of our service experts would be happy to come over and take a look, and get you back to the noiseless and warm home you have come to love.

Loud Bang When Furnace Starts

If there is a loud pop when your furnace turns on, there are a few things that could be occurring. Two typical problems are a dirty furnace burner or ignitor. Stretching and contracting air ducts can also create loud noises after the heating blower turns on. A soiled furnace burner or ignitor could prevent 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 break. Not only could that result in a carbon monoxide leak, but you will have to replace the heat exchanger, which can be very costly.

The other problem, extending and contracting air ducts, is a typical noise complaint for people with metal ducts. If your furnace is making the loud pop 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 issue and get your home back in working order. Also, this will also result in improved comfort as well.

Whining Noise

If you hear a squealing sound, it could be the blower motor is malfunctioning, the shaft bearings are in need of oil, or an issue with the blower belt. A seasonal system tune-up will help discover these issues before they become serious problems so make sure you give us a call at 919-578-4329 and we’ll make sure your heating system is ready to keep you safe and warm all winter long.

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