Why Your Furnace May Be Making These Noises

November 23, 2016

This is the time of year homeowners start turning on their heating systems to settle in for a cold winter. Unfortunately, when some furnaces start up, especially if it hasn’t undergone a fall heating tune-up, there are some issues that need to be assessed. A major problem you may encounter is your furnace making unusual noises – read about these furnace noises you should never neglect.

Scraping Sound

If you hear a loud scraping racket that sounds like metal on metal, there is probably something faulty with the blower wheel. If you hear a sound like this, turn off your furnace ASAP and call Fras-Air/General Service Experts Heating & Air Conditioning to inspect the furnace. There are a couple things that could be wrong with the blower wheel. First, it may just be loose and if the piece is not too damaged, can be tightened. Second, it may be that the blower wheel is broken and in need of replacement. Or third, it may 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 out and take a look, and get you back to the quiet and comfortable home you have come to adore.

Loud Bang When Furnace Starts

If there is a loud bang when your furnace comes on, there are a handful of things that could be happening. Two typical things are a dirty furnace burner or ignitor. Stretching and contracting air ducts can also cause loud booms after the furnace blower comes on. A filthy furnace burner or ignitor could holdup the burners from igniting, forcing 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 these small explosions caused the heat exchanger to deteriorate. Not only could that cause a carbon monoxide leak, but you would also have to replace the heat exchanger, which can be very costly.

The other trouble, expanding and contracting air ducts, is a common noise complaint for people with metal ducts. If your system is making the loud pop and it is caused by your air ducts, it could be an indication of undersized ducts, closed vents, or a clogged air filter. Fras-Air/General Service Experts Heating & Air Conditioning is happy to set up an appointment to diagnose your issue and get your home back in shape for the winter. Additionally, this will also result in 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 system tune-up will help find these issues before they become serious problems so make sure you contact us at 908-448-2154 and we’ll make sure your heating equipment is ready to keep you safe and warm all winter long.

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