Why Your Furnace May Be Making These Noises

November 23, 2016

This is the time of year families start turning on their heating systems to settle in for a cold winter. Unfortunately, when some heaters start up, especially if it hasn’t undergone a fall heating tune-up, there are some troubles that need to be assessed. A major problem you may discover is your furnace making weird noises – take a look at these furnace noises you should never disregard.

Scraping Sound

If you hear a loud scratching noise that sounds like metal on metal, there is likely something defective with the blower wheel. If you hear a noise like this, power off your furnace ASAP and call Service Experts Heating & 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 part is not too harmed, can be tightened. Second, it may 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 entire blower assembly to shake uncontrollably. One of our service experts would be happy to come over and take a look, and get you back to the quiet and warm home you have come to expect.

Loud Bang When Furnace Starts

If there is a loud bang when your furnace comes 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 noises after the heating blower turns on. A dirty 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 pop 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 result in a carbon monoxide leak, but you’d end up having to replace the heat exchanger, which may be very pricey.

The other problem, expanding and contracting air ducts, is a common noise complaint for homes with metal ducts. If your system is making the loud pop and it is caused by your air ducts, it could be a symptom of undersized ducts, blocked vents, or a clogged air filter. Service Experts Heating & Air Conditioning is happy to visit your home to diagnose your trouble 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 motor is malfunctioning, the shaft bearings are in need of oil, or an issue with the blower belt. A routine furnace tune-up will help discover these issues before they become big problems so make sure you call us at 540-302-8645 and we’ll make sure your furnace is ready to keep you safe and warm all winter long.

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