Why Your Furnace May Be Making These Noises

November 23, 2016

This is the time of year people start turning on their heaters to settle in for a frigid winter. Unfortunately, when some heating systems start up, especially if it hasn’t undergone a fall heating tune-up, there are some issues that need to be examined. A major problem you may discover is your furnace making weird noises – take a look at these furnace noises you should never ignore.

Scraping Sound

If you hear a loud raking sound that sounds like metal on metal, there is probably something wrong with the blower wheel. If you hear a noise like this, turn off your furnace immediately and call Aramendia Plumbing, Heating and Air, A Service Experts Company to inspect the furnace. There are multiple things that could be wrong with the blower wheel. First, it might just be loose and if the part is not too harmed, can be tightened. Second, it may be that the blower wheel is broken and will require replacement. Or third, it could be that the motor mount actually broke, causing the entire blower assembly to shake uncontrollably. One of our service technicians would be happy to come to your home and take a look, and get you back to the noiseless and cozy home you have come to love.

Loud Bang When Furnace Starts

If there is a loud bang when your furnace comes on, there are a few things that could be occurring. Two typical things are a dirty furnace burner or ignitor. Expanding and contracting air ducts can also cause loud booms after the heating system blower starts up. A dirty furnace burner or ignitor could prevent the burners from igniting, resulting in 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 those 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 issue, stretching and contracting air ducts, is a usual noise complaint for people with metal ducts. If your equipment is making the loud pop and it is caused by your air ducts, it could be a symptom of undersized ducts, obstructed vents, or a clogged air filter. Aramendia Plumbing, Heating and Air, A Service Experts Company is happy to come out to diagnose your problem and get your home back in shape for the winter. Also, this will also give you improved comfort as well.

Whining Noise

If you hear a high-pitched disturbance, it could be the blower motor is malfunctioning, the shaft bearings are in need of oil, or an issue with the blower belt. A seasonal system tune-up will help catch these issues before they become major problems so make sure you give us a call at 210-404-4233 and we’ll make sure your furnace is ready to keep you safe and cozy all winter long.

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