Why Your Furnace May Be Making These Noises Published on November 23, 2016 This is the time of year homeowners 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 yearly heating tune-up, there are some issues that need to be examined. A serious problem you may encounter is your furnace making funny noises – check out these furnace noises you should never ignore. Scraping Sound If you hear a loud raking racket that sounds like metal on metal, there is likely something faulty with the blower wheel. If you hear a sound like this, shut off your furnace immediately and call Hammond Plumbing & Heating to inspect the furnace. There are multiple things that could be wrong with the blower wheel. First, it could just be loose and if the piece is not too impaired, can be tightened. Second, it may be that the blower wheel is broken and will require replacement. Or third, it might be that the motor mount is what broke, causing the entire blower assembly to shake uncontrollably. One of our service experts would be happy to come out and take a look, and get you back to the silent 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 few things that could be occurring. Two general problems are a dirty furnace burner or ignitor. Extending and contracting air ducts can also create loud sounds after the furnace blower comes on. A dirty furnace burner or ignitor could delay the burners from igniting, forcing gas to build up. When the gas finally ignites, it will create the loud boom you hear. This could end up being a safety issue, especially if one of those small explosions caused the heat exchanger to deteriorate. Not only could that produce a carbon monoxide leak, but you would also have to replace the heat exchanger, which may be very costly. The other problem, extending and contracting air ducts, is a usual noise complaint for homes with metal ducts. If your system is making the loud pop and it is produced by your air ducts, it could be an indication of undersized ducts, obstructed vents, or a clogged air filter. Hammond Plumbing & Heating is happy to come out to diagnose your problem and get your home back in working order. Also, this will also provide improved comfort as well. Whining Noise If you hear a high-pitched sound, 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 seasonal furnace tune-up will help discover these issues before they become major problems so make sure you contact us at 519-894-3222 and we’ll make sure your heating equipment is ready to keep you safe and cozy all winter long.