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 heaters start up, especially if it hasn’t received a fall heating tune-up, there are some issues that need to be inspected. A serious problem you may discover is your furnace making weird noises – take a look at these furnace noises you should never ignore.

Scraping Sound

If you hear a loud scratching noise that sounds like metal on metal, there is likely something wrong with the blower wheel. If you hear a noise like this, turn off your furnace right away and call Church Services to inspect the equipment. There are multiple things that could be faulty 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 in need of replacement. Or third, it might be that the motor mount actually broke, causing the whole blower assembly to vibrate uncontrollably. One of our service technicians would be happy to come to your home and take a look, and get you back to the quiet and cozy home you have come to expect.

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 going on. Two general issues are a dirty furnace burner or ignitor. Stretching and contracting air ducts can also produce loud booms after the heating blower turns on. A dirty furnace burner or ignitor could holdup the burners from igniting, forcing gas to build up. When the gas finally ignites, it will create the loud boom you hear. This could end up being a safety issue, especially if one of those small explosions caused the heat exchanger to crack. Not only could that cause a carbon monoxide leak, but you will have to replace the heat exchanger, which could be very pricey.

The other problem, expanding and contracting air ducts, is a usual noise complaint for homeowners with metal ducts. If your furnace is making the loud boom and it is caused by your air ducts, it could be a sign of undersized ducts, closed vents, or a clogged air filter. Church Services is happy to visit your home to diagnose your issue and get your home back in working order. Additionally, this will also give you 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. An annual furnace tune-up will help find these issues before they become serious problems so make sure you give us a call at 713-396-3760 and we’ll make sure your furnace is ready to keep you safe and warm all winter long.

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