Why Your Furnace May Be Making These Noises

November 23, 2016

It’s that time of year when 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 received a seasonal heating tune-up, there are some issues that need to be examined. A big problem you may run into is your furnace making funny noises – check out these furnace noises you should never disregard.

Scraping Sound

If you hear a loud raking sound that sounds like metal on metal, there is probably something defective with the blower wheel. If you hear a noise like this, shut off your furnace ASAP and call McKinley Heating Service Experts to inspect the furnace. There are a few things that could be amiss with the blower wheel. First, it may just be loose and if the piece is not too harmed, can be tightened. Second, it might be that the blower wheel is broken and will require replacement. Or third, it may be that the motor mount itself broke, causing the entire 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 cozy home you have come to love.

Loud Bang When Furnace Starts

If there is a loud bang when your furnace kicks on, there are a handful of things that could be happening. Two common problems are a dirty furnace burner or ignitor. Extending and contracting air ducts can also cause loud bangs after the heating blower turns on. A dirty furnace burner or ignitor could holdup the burners from igniting, resulting in 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 those 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 pricey.

The other problem, expanding and contracting air ducts, is a usual noise complaint for homeowners with metal ducts. If your furnace is making the loud bang and it is caused by your air ducts, it could be a symptom of undersized ducts, blocked vents, or a clogged air filter. McKinley Heating Service Experts is happy to visit your home 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 squealing disturbance, 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 give us a call at 780-800-7092 and we’ll make sure your heating equipment is ready to keep you safe and comfortable all winter long.

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