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

    Scraping Sound

    If you hear a loud raking noise that sounds like metal on metal, there is probably something faulty with the blower wheel. If you hear a noise like this, turn off your furnace right away and call Strand Brothers Service Experts to inspect the furnace. There are a few things that could be amiss with the blower wheel. First, it might just be loose and if the piece is not too damaged, can be tightened. Second, it might be that the blower wheel is broken and needs to be replaced. Or third, it might be that the motor mount is what broke, causing the entire blower assembly to rattle 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 adore.

    Loud Bang When Furnace Starts

    If there is a loud bang when your furnace kicks on, there are a couple things that could be happening. Two common issues are a dirty furnace burner or ignitor. Stretching and contracting air ducts can also cause loud bangs after the furnace blower comes on. A soiled furnace burner or ignitor could prevent the burners from igniting, forcing gas to build up. When the gas does finally ignite, it will create the loud pop you hear. This could result in 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 will have to replace the heat exchanger, which may be very expensive.

    The other trouble, extending and contracting air ducts, is a usual noise complaint for people with metal ducts. If your system is making the loud bang and it is produced by your air ducts, it could be a sign of undersized ducts, closed vents, or a clogged air filter. Strand Brothers Service Experts is happy to come out to diagnose your trouble and get your home back to order. Ultimately, this will also provide improved comfort as well.

    Whining Noise

    If you hear a high-pitched 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 furnace tune-up will help catch these issues before they become big problems so make sure you give us a call at 512-596-1257 and we’ll make sure your furnace is ready to keep you safe and warm all winter long.

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