Why Your Furnace May Be Making These Noises

This is the time of year people start turning on their heating systems to settle in for a cold winter. Unfortunately, when some heating systems start up, especially if it hasn’t received a seasonal heating tune-up, there are some problems that need to be inspected. A big problem you may run into is your furnace making unusual noises – take a look at these furnace noises you should never neglect. 

Scraping Sound 

If you hear a loud raking sound that sounds like metal on metal, there is probably something wrong with the blower wheel. If you hear a sound like this, shut off your furnace right away and call Stevenson Service Experts to inspect the equipment. There are a couple things that could be wrong 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 may be that the motor mount itself broke, causing the entire blower assembly to vibrate uncontrollably. One of our service professionals would be happy to come out and take a look, and get you back to the noiseless and cozy home you have come to love. 

Loud Bang When Furnace Starts 

If there is a loud boom when your furnace comes on, there are a handful of things that could be occurring. Two typical things are a dirty furnace burner or ignitor. Stretching and contracting air ducts can also create loud noises after the heating system blower comes on. A soiled furnace burner or ignitor could prevent the burners from igniting, resulting in gas to build up. When the gas finally does ignite, it will create the loud boom you hear. This could result in 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 will have to replace the heat exchanger, which could be very costly. 

The other problem, expanding and contracting air ducts, is a common 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 a sign of undersized ducts, obstructed vents, or a clogged air filter. Stevenson Service Experts is happy to come out to diagnose your problem and get your home back in working order. Ultimately, this will also result in improved comfort as well. 

Whining Noise 

If you hear a high-pitched 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 furnace tune-up will help find these issues before they become serious problems so make sure you contact us at 614-334-3192 and we’ll make sure your furnace is ready to keep you safe and cozy all winter long. 

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