Why Your Furnace May Be Making These Noises

November 23, 2016

Now is when families start turning on their furnaces to settle in for a long winter. Unfortunately, when some heaters start up, especially if it hasn’t received a seasonal heating tune-up, there are some issues that need to be examined. 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 scraping racket that sounds like metal on metal, there is probably something wrong with the blower wheel. If you hear a noise like this, power off your furnace immediately and call Service Experts Heating & Air Conditioning to inspect the system. There are a couple things that could be wrong with the blower wheel. First, it could just be loose and if the piece is not too harmed, can be tightened. Second, it could be that the blower wheel is broken and needs to be replaced. Or third, it could be that the motor mount actually broke, causing the complete blower assembly to rattle uncontrollably. One of our service experts would be happy to come over and take a look, and get you back to the noiseless and cozy home you have come to expect.

Loud Bang When Furnace Starts

If there is a loud bang when your furnace turns on, there are a handful of things that could be happening. Two common things are a dirty furnace burner or ignitor. Extending and contracting air ducts can also create loud bangs after the heating system blower starts up. A filthy furnace burner or ignitor could holdup the burners from igniting, forcing gas to build up. When the gas does finally ignite, it will create the loud bang 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 produce a carbon monoxide leak, but you’d end up having to replace the heat exchanger, which may be very costly.

The other issue, stretching and contracting air ducts, is a common noise complaint for people with metal ducts. If your furnace is making the loud pop and it is produced 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 come out to diagnose your issue and get your home back in working order. Additionally, this will also provide improved comfort as well.

Whining Noise

If you hear a high-pitched disturbance, 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. An annual heating tune-up will help discover these issues before they become serious problems so make sure you call us at 925-364-5427 and we’ll make sure your heating system is ready to keep you safe and warm all winter long.

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