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 heating systems start up, especially if it hasn’t had a seasonal heating tune-up, there are some issues that need to be assessed. A serious problem you may discover is your furnace making funny noises – read about these furnace noises you should never ignore.

Scraping Sound

If you hear a loud scratching sound that sounds like metal on metal, there is probably something faulty with the blower wheel. If you hear a sound like this, turn off your furnace ASAP and call Service Experts Heating & Air Conditioning to inspect the equipment. There are a couple things that could be wrong with the blower wheel. First, it might just be loose and if the part is not too harmed, can be tightened. Second, it might be that the blower wheel is broken and in need of replacement. Or third, it could be that the motor mount actually broke, causing the entire blower assembly to shake uncontrollably. One of our service technicians would be happy to come over and take a look, and get you back to the noiseless and cozy home you have come to love.

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 going on. Two general issues are a dirty furnace burner or ignitor. Extending and contracting air ducts can also create loud noises after the heating blower turns on. A filthy furnace burner or ignitor could delay the burners from igniting, causing gas to build up. When the gas finally ignites, 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 deteriorate. Not only could that cause a carbon monoxide leak, but you will have to replace the heat exchanger, which could be very pricey.

The other issue, stretching and contracting air ducts, is a usual noise complaint for homeowners with metal ducts. If your equipment is making the loud bang and it is produced by your air ducts, it could be a symptom of undersized ducts, closed 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. Additionally, this will also result in improved comfort as well.

Whining Noise

If you hear a whining noise, it could be the shaft bearings are in need of oil, there is an issue with the blower belt, or the blower motor is malfunctioning. A routine heating tune-up will help find these issues before they become big problems so make sure you call us at 305-440-1505 and we’ll make sure your furnace is ready to keep you safe and warm all winter long.

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