Why Your Furnace May Be Making These Noises

November 23, 2016

Now is when homeowners start turning on their heating systems to settle in for a cold winter. Unfortunately, when some heaters start up, especially if it hasn’t received a fall heating tune-up, there are some problems that need to be assessed. A major problem you may encounter is your furnace making weird noises – check out these furnace noises you should never neglect.

Scraping Sound

If you hear a loud scratching sound that sounds like metal on metal, there is possibly something wrong with the blower wheel. If you hear a sound like this, turn off your furnace ASAP and call Service Experts Heating & Air Conditioning to inspect the system. There are multiple things that could be wrong with the blower wheel. First, it may just be loose and if the part is not too damaged, can be tightened. Second, it could 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 rattle uncontrollably. One of our service technicians would be happy to come out and take a look, and get you back to the silent and comfortable 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 couple things that could be occurring. Two common issues are a dirty furnace burner or ignitor. Expanding and contracting air ducts can also create loud sounds after the furnace blower comes on. A soiled furnace burner or ignitor could delay the burners from igniting, causing gas to build up. When the gas does finally ignite, it will create the loud pop you hear. This could cause a safety issue, especially if one of these small explosions caused the heat exchanger to crack. Not only could that cause a carbon monoxide leak, but you would also have to replace the heat exchanger, which could be very expensive.

The other problem, stretching and contracting air ducts, is a usual noise complaint for homes with metal ducts. If your equipment is making the loud boom and it is a result of your air ducts, it could be a sign of undersized ducts, obstructed vents, or a clogged air filter. Service Experts Heating & Air Conditioning is happy to come out to diagnose your issue and get your home back to order. Ultimately, this will also give you improved comfort as well.

Whining Noise

If you hear a high-pitched disturbance, 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 seasonal furnace tune-up will help discover these issues before they become major problems so make sure you call us at 403-279-5760 and we’ll make sure your furnace is ready to keep you safe and cozy all winter long.

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