Why Your Furnace May Be Making These Noises

Now is when people start turning on their furnaces to settle in for a frigid winter. Unfortunately, when some heating systems start up, especially if it hasn’t had a yearly heating tune-up, there are some problems that need to be examined. A major problem you may encounter is your furnace making funny noises – take a look at these furnace noises you should never neglect. 

Scraping Sound 

If you hear a loud scraping racket that sounds like metal on metal, there is likely something wrong with the blower wheel. If you hear a noise like this, shut off your furnace ASAP and call Stallion Heating and Air Conditioning to inspect the system. There are a few things that could be faulty with the blower wheel. First, it might just be loose and if the component is not too harmed, can be tightened. Second, it could be that the blower wheel is broken and in need of replacement. Or third, it may 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 silent and cozy home you have come to expect. 

Loud Bang When Furnace Starts 

If there is a loud boom when your furnace turns on, there are a couple things that could be going on. Two common issues are a dirty furnace burner or ignitor. Stretching and contracting air ducts can also create loud noises after the furnace blower turns on. A soiled furnace burner or ignitor could delay the burners from igniting, causing gas to build up. When the gas finally ignites, it will create the loud bang you hear. This could result in a safety issue, especially if one of the small explosions caused the heat exchanger to crack. Not only could that produce a carbon monoxide leak, but you would also have to replace the heat exchanger, which could be very costly. 

The other issue, 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 produced by your air ducts, it could be an indication of undersized ducts, closed vents, or a clogged air filter. Stallion Heating and Air Conditioning is happy to come out to diagnose your issue and get your home back in shape for the winter. Ultimately, this will also provide improved comfort as well. 

Whining Noise 

If you hear a high-pitched sound, it could be the blower belt, shaft bearings in need of oil, or even a malfunctioning blower motor. An annual heating tune-up will help discover these issues before they become serious problems so make sure you call us at 215-259-5850 and we’ll make sure your furnace is ready to keep you safe and comfortable all winter long. 

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