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 furnaces start up, especially if it hasn’t received a fall heating tune-up, there are some issues that need to be inspected. A major problem you may discover is your furnace making funny noises – check out these furnace noises you should never ignore.

Scraping Sound

If you hear a loud scratching noise that sounds like metal on metal, there is probably something wrong with the blower wheel. If you hear a noise like this, shut off your furnace right away and call Church Services to inspect the equipment. There are multiple things that could be faulty with the blower wheel. First, it might just be loose and if the piece is not too impaired, can be tightened. Second, it could be that the blower wheel is broken and in need of replacement. Or third, it might be that the motor mount itself broke, causing the whole blower assembly to shake uncontrollably. One of our service experts would be happy to come to your home 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 pop when your furnace kicks on, there are a handful of things that could be happening. Two general things are a dirty furnace burner or ignitor. Expanding and contracting air ducts can also produce loud booms after the heating blower turns on. A dirty furnace burner or ignitor could holdup the burners from igniting, forcing gas to build up. When the gas finally ignites, it will create the loud bang you hear. This could cause a safety issue, especially if one of these small explosions caused the heat exchanger to break. Not only could that cause a carbon monoxide leak, but you will have to replace the heat exchanger, which can be very expensive.

The other problem, extending and contracting air ducts, is a usual noise complaint for homeowners with metal ducts. If your furnace is making the loud boom and it is a result of your air ducts, it could be an indication of undersized ducts, closed vents, or a clogged air filter. Church Services is happy to visit your home to diagnose your issue and get your home back in working order. Ultimately, this will also give you improved comfort as well.

Whining Noise

If you hear a whining sound, 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 serious problems so make sure you give us a call at 713-396-3760 and we’ll make sure your heating system is ready to keep you safe and comfortable all winter long.

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