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 received a seasonal heating tune-up, there are some issues that need to be inspected. A major problem you may run into is your furnace making unusual noises – check out these furnace noises you should never disregard.

Scraping Sound

If you hear a loud scraping sound that sounds like metal on metal, there is possibly something defective with the blower wheel. If you hear something like this, turn off your furnace ASAP and call Service Experts Heating & Air Conditioning to inspect the equipment. There are multiple things that could be amiss with the blower wheel. First, it might just be loose and if the component is not too damaged, 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 itself broke, causing the whole 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 noiseless and comfortable home you have come to adore.

Loud Bang When Furnace Starts

If there is a loud boom when your furnace kicks on, there are a few things that could be happening. Two typical problems are a dirty furnace burner or ignitor. Stretching and contracting air ducts can also cause loud bangs after the furnace blower comes on. A dirty furnace burner or ignitor could prevent the burners from igniting, causing gas to build up. When the gas finally ignites, it will create the loud bang you hear. This could cause a safety issue, especially if one of the small explosions caused the heat exchanger to deteriorate. Not only could that cause a carbon monoxide leak, but you will 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 produced by your air ducts, it could be an indication of undersized ducts, obstructed vents, or a clogged air filter. Service Experts Heating & Air Conditioning is happy to come out to diagnose your trouble and get your home back in shape for the winter. Also, this will also give you improved comfort as well.

Whining Noise

If you hear a high-pitched noise, it could be the blower motor is malfunctioning, the shaft bearings are in need of oil, or an issue with the blower belt. A seasonal system tune-up will help catch these issues before they become big problems so make sure you give us a call at 866-397-3787 and we’ll make sure your heating equipment is ready to keep you safe and cozy all winter long.

Contact Us