Why Your Furnace May Be Making These Noises

November 23, 2016

Now is when homeowners start turning on their heating systems to settle in for a cold 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 inspected. A big problem you may run into is your furnace making weird noises – take a look at these furnace noises you should never ignore.

Scraping Sound

If you hear a loud scraping noise that sounds like metal on metal, there is likely something defective with the blower wheel. If you hear something like this, shut off your furnace immediately and call Pardee Service Experts to inspect the system. There are multiple things that could be amiss 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 needs to be replaced. Or third, it might be that the motor mount actually broke, causing the whole blower assembly to shake uncontrollably. One of our service professionals would be happy to come to your home and take a look, and get you back to the silent and cozy home you have come to love.

Loud Bang When Furnace Starts

If there is a loud pop when your furnace kicks on, there are a handful of things that could be happening. Two common issues are a dirty furnace burner or ignitor. Stretching and contracting air ducts can also produce loud sounds after the heating system blower starts up. A dirty furnace burner or ignitor could holdup the burners from igniting, causing gas to build up. When the gas does finally ignite, it will create the loud pop you hear. This could end up being 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 would also have to replace the heat exchanger, which could be very pricey.

The other issue, expanding and contracting air ducts, is a common noise complaint for homeowners with metal ducts. If your furnace is making the loud bang and it is a result of your air ducts, it could be a sign of undersized ducts, obstructed vents, or a clogged air filter. Pardee Service Experts is happy to visit your home to diagnose your trouble and get your home back in working order. Additionally, 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 seasonal system tune-up will help discover these issues before they become big problems so make sure you give us a call at 843-410-6103 and we’ll make sure your heating system is ready to keep you safe and warm all winter long.

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