Why Your Furnace May Be Making These Noises

November 23, 2016

This is the time of year families start turning on their furnaces to settle in for a long winter. Unfortunately, when some furnaces start up, especially if it hasn’t undergone a fall heating tune-up, there are some problems that need to be examined. A serious problem you may discover is your furnace making weird noises – take a look at these furnace noises you should never neglect.

Scraping Sound

If you hear a loud raking noise that sounds like metal on metal, there is likely something wrong with the blower wheel. If you hear something like this, turn off your furnace immediately and call Donelson Air Service Experts to inspect the equipment. There are a few things that could be wrong with the blower wheel. First, it might just be loose and if the piece is not too impaired, can be tightened. Second, it may be that the blower wheel is broken and will require replacement. Or third, it may be that the motor mount is what broke, causing the whole blower assembly to rattle uncontrollably. One of our service experts would be happy to come out and take a look, and get you back to the quiet and cozy 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 going on. Two common problems are a dirty furnace burner or ignitor. Extending and contracting air ducts can also cause loud booms after the furnace blower comes on. A filthy furnace burner or ignitor could delay the burners from igniting, causing gas to build up. When the gas finally does ignite, it will create the loud pop 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 would also 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 homeowners with metal ducts. If your system is making the loud bang and it is produced by your air ducts, it could be a symptom of undersized ducts, blocked vents, or a clogged air filter. Donelson Air Service Experts is happy to come out to diagnose your trouble and get your home back in shape for the winter. Additionally, this will also provide improved comfort as well.

Whining Noise

If you hear a whining noise, it could be the blower belt, shaft bearings in need of oil, or even a malfunctioning blower motor. A seasonal system tune-up will help discover these issues before they become serious problems so make sure you contact us at 615-953-9885 and we’ll make sure your heating equipment is ready to keep you safe and comfortable all winter long.

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