Why Your Furnace May Be Making These Noises

November 23, 2016

It’s that time of year 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 seasonal heating tune-up, there are some problems that need to be examined. A serious problem you may discover is your furnace making funny noises – check out these furnace noises you should never ignore.

Scraping Sound

If you hear a loud scraping sound that sounds like metal on metal, there is probably something faulty with the blower wheel. If you hear a sound like this, shut off your furnace right away and call Service Experts Heating & Air Conditioning 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 could be that the blower wheel is broken and in need of replacement. Or third, it could be that the motor mount is what broke, causing the whole blower assembly to shake uncontrollably. One of our service professionals would be happy to come out and take a look, and get you back to the quiet and warm home you have come to adore.

Loud Bang When Furnace Starts

If there is a loud boom when your furnace turns on, there are a handful of things that could be occurring. Two common things are a dirty furnace burner or ignitor. Stretching and contracting air ducts can also cause loud sounds after the heating system blower starts up. 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 bang you hear. This could cause a safety issue, especially if one of those small explosions caused the heat exchanger to crack. Not only could that result in a carbon monoxide leak, but you’d end up having to replace the heat exchanger, which can be very expensive.

The other trouble, expanding and contracting air ducts, is a typical noise complaint for people with metal ducts. If your equipment is making the loud bang and it is a result of your air ducts, it could be a sign of undersized ducts, blocked vents, or a clogged air filter. Service Experts Heating & Air Conditioning is happy to set up an appointment to diagnose your issue and get your home back in shape for the winter. Also, this will also provide improved comfort as well.

Whining Noise

If you hear a squealing sound, it could be the blower belt, shaft bearings in need of oil, or even a malfunctioning blower motor. A routine furnace tune-up will help catch these issues before they become big problems so make sure you contact us at 407-329-7661 and we’ll make sure your heating system is ready to keep you safe and comfortable all winter long.

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