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 furnaces start up, especially if it hasn’t received a yearly heating tune-up, there are some problems that need to be examined. A major problem you may discover is your furnace making weird noises – check out these furnace noises you should never ignore.

Scraping Sound

If you hear a loud scratching noise that sounds like metal on metal, there is possibly something faulty with the blower wheel. If you hear a noise like this, shut off your furnace right away and call Stevenson Service Experts to inspect the system. There are multiple things that could be faulty with the blower wheel. First, it could just be loose and if the component is not too damaged, can be tightened. Second, it might be that the blower wheel is broken and needs to be replaced. Or third, it might be that the motor mount actually broke, causing the entire blower assembly to vibrate uncontrollably. One of our service technicians would be happy to come over and take a look, and get you back to the silent and cozy home you have come to adore.

Loud Bang When Furnace Starts

If there is a loud pop when your furnace turns on, there are a handful of things that could be happening. Two general things are a dirty furnace burner or ignitor. Expanding and contracting air ducts can also produce loud booms 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 finally does ignite, it will create the loud boom you hear. This could end up being a safety issue, especially if one of these small explosions caused the heat exchanger to crack. Not only could that result in a carbon monoxide leak, but you would also have to replace the heat exchanger, which can be very expensive.

The other trouble, stretching and contracting air ducts, is a typical noise complaint for homeowners with metal ducts. If your equipment is making the loud boom and it is caused by your air ducts, it could be a symptom of undersized ducts, blocked vents, or a clogged air filter. Stevenson Service Experts is happy to come out to diagnose your problem and get your home back to order. Ultimately, this will also provide improved comfort as well.

Whining Noise

If you hear a high-pitched disturbance, 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 heating tune-up will help catch these issues before they become serious problems so make sure you call us at 937-503-7896 and we’ll make sure your heating system is ready to keep you safe and warm all winter long.

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