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Proudly Serving The Columbia Area Since 1985


Fulmer Heating & Cooling Blog

Does Your Furnace Sound Like It’s Haunted?

Halloween is a favorite time of year for many people who enjoy the thrills and chills of the season. But the last thing you want to give you a fright in your home is a furnace that sounds like it’s haunted. 

Furnaces that haven’t been used for many months can emit moans and groans when they’re first turned on for the heating season. If your furnace sounds like it’s possessed, don’t delay calling us for furnace repair. The last thing you want this fall is a furnace horror story of epic proportions.

Knocking and Rattling

The sound of mysterious knocking doesn’t mean the trick-or-treaters have arrived early. Knocking noises usually mean something is loose and is knocking against other metal parts. A blower fan could be loose and its blades are knocking against its casing. 

If you’re hearing a rattling noise from the burner compartment, it could be due to clogged burners as they vibrate and make a rattling sound. A furnace that’s working as it’s supposed to should be fairly silent. If these noises are giving you a fright, it’s time to call for a repair.

Scratching and Scraping

Does it sound like a wild creature is trying to claw its way out of your furnace? If you’re hearing scraping and scratching noises, it usually means there’s a metal part loose inside the furnace. Perhaps the blower wheel is loose and scraping against its metal casing. Eliminate these sounds that are as annoying as fingernails on a chalkboard by calling us ASAP for furnace repair.

Wailing and Screeching

Does your furnace sound like a wailing banshee is locked inside of it? This terrifying noise could be caused by shaft bearings that need lubrication or a loose blower belt. Wailing and screeching could also mean that the system is in dire need of lubrication and this tends to occur in systems that haven’t received regular maintenance. 

Banging and Booming

Do you own a gas furnace? A banging and booming noise from a gas furnace will give anyone the heebie-jeebies. These could be caused by a small gas explosion that’s occurring in your furnace due to a gas buildup. When the ignition isn’t lighting properly, gas accumulates in the combustion chamber and makes a “boom” when it finally ignites. This is a potential safety issue that should be addressed promptly.

Rumbling and Grumbling

Rumbling and grumbling noises coming from your furnace may sound like a host of cranky, hungry ghosts have taken up residence inside. Rumbling noises can be caused by a lack of cleaning that occurs during routine maintenance. 

The gas burners could be dirty with an accumulation of soot and dirt. This restricts the airflow that is necessary for the combustion process. As a result, a deep, rumbling sound occurs when the furnace turns on and runs. 

This sound can also occur when fuel continues to burn in the combustion chamber even though the burners are turned off. A rumbling sound in a gas furnace needs immediate attention from a qualified HVAC technician.

Contact Fulmer Heating & Cooling today for furnace repair in Columbia, SC!

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