Why Your Furnace May Be Making These Noises

November 23, 2016

Now is when families start turning on their furnaces to settle in for a long winter. Unfortunately, when some furnaces start up, especially if it hasn’t had a yearly heating tune-up, there are some troubles that need to be assessed. A big problem you may discover is your furnace making unusual noises – read about these furnace noises you should never ignore.

Scraping Sound

If you hear a loud raking racket that sounds like metal on metal, there is probably something defective with the blower wheel. If you hear something like this, power off your furnace immediately and call Service Experts Heating & Air Conditioning to inspect the equipment. There are a few 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 might be that the blower wheel is broken and needs to be replaced. Or third, it may be that the motor mount is what broke, causing the whole blower assembly to vibrate uncontrollably. One of our service experts would be happy to come over and take a look, and get you back to the silent and comfortable 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 couple things that could be going on. Two typical things are a dirty furnace burner or ignitor. Stretching and contracting air ducts can also cause loud sounds after the furnace blower comes on. A soiled furnace burner or ignitor could prevent the burners from igniting, causing gas to build up. When the gas finally ignites, it will create the loud bang you hear. This could result in 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’d end up having to replace the heat exchanger, which can be very pricey.

The other issue, expanding and contracting air ducts, is a typical noise complaint for homeowners with metal ducts. If your equipment is making the loud boom and it is caused by your air ducts, it could be a symptom of undersized ducts, obstructed vents, or a clogged air filter. Service Experts Heating & Air Conditioning is happy to set up an appointment to diagnose your trouble and get your home back in shape for the winter. Also, this will also result in improved comfort as well.

Whining Noise

If you hear a high-pitched noise, it could be the blower motor is malfunctioning, the shaft bearings are in need of oil, or an issue with the blower belt. An annual heating tune-up will help discover these issues before they become big problems so make sure you give us a call at 239-908-6991 and we’ll make sure your heating system is ready to keep you safe and cozy all winter long.

Contact Us