Why Your Furnace May Be Making These Noises

November 23, 2016

Now is when homeowners 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 troubles that need to be inspected. A serious problem you may encounter is your furnace making funny noises – check out these furnace noises you should never ignore.

Scraping Sound

If you hear a loud scratching sound that sounds like metal on metal, there is possibly something faulty with the blower wheel. If you hear something like this, turn off your furnace immediately and call Bob Brown Service Experts to inspect the furnace. There are a couple things that could be amiss with the blower wheel. First, it may just be loose and if the piece is not too impaired, can be tightened. Second, it could 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 shake uncontrollably. One of our service professionals would be happy to come over and take a look, and get you back to the silent and warm home you have come to expect.

Loud Bang When Furnace Starts

If there is a loud pop when your furnace kicks 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 produce loud bangs after the heating system blower starts up. A dirty furnace burner or ignitor could prevent the burners from igniting, forcing gas to build up. When the gas finally does ignite, it will create the loud bang you hear. This could result in a safety issue, especially if one of these small explosions caused the heat exchanger to break. Not only could that produce a carbon monoxide leak, but you would also have to replace the heat exchanger, which can be very pricey.

The other trouble, stretching and contracting air ducts, is a typical noise complaint for homeowners with metal ducts. If your furnace is making the loud boom and it is a result of your air ducts, it could be a symptom of undersized ducts, closed vents, or a clogged air filter. Bob Brown Service Experts is happy to visit your home 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 squealing noise, it could be the blower motor is malfunctioning, the shaft bearings are in need of oil, or an issue with the blower belt. An annual furnace tune-up will help discover these issues before they become big problems so make sure you give us a call at 623-243-4517 and we’ll make sure your heating equipment is ready to keep you safe and warm all winter long.

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