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What Furnace Noises Mean

Furnace noises are one of the most common ways that homeowners can identify problems with their heating system. Simply noticing a strange noise coming from your furnace isn’t enough, however. You need to know what to listen for if you are to react quickly enough to mitigate the damage to your furnace.

With that in mind, let’s take a look at some of the most common furnace noises, and what they mean.

Grinding

If you hear a grinding noise coming from your furnace, it is very likely coming from the air handler. The air handler is a collection of parts that work together to circulate air throughout your house. The air handler motor is arguably the most important part of the air handler, as well as being the part put under the most strain during operation. In order to decrease the level of stress on the motor, it is equipped with lubricated bearings that lessen the amount of friction during operation. This prevents the motor from overheating. As the bearings age, however, they begin to wear down and lose their lubrication. This increases the friction on the motor, causing it to work harder than it should. Those worn-down bearings are the source of the grinding sound. If not fixed immediately, the motor could burn out and require replacement.

Booming

A booming sound coming from your furnace is often caused by a burner firing later than the others. The burner assembly is a series of flame jets connected to the gas line of your furnace. These burners are the source of the heat that the furnace provides. Though the primary byproduct of burning fuel is heat, there are many other byproducts that are created. Carbon particles are one of these byproducts. Over time, the carbon particles can build up around and in the burner assembly. Eventually, the buildup can become so advanced that it makes the burner difficult to light. When the burner finally does light, it creates that deep booming sound as it ignites the gas flow. If not cleaned off, the carbon buildup can eventually prevent the burner from lighting altogether.

If you are hearing strange noises coming from your furnace, call Design Comfort. We provide furnace repair throughout the Millcreek area.

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