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What Does That Clicking Sound from My Furnace Mean?

Furnaces are capable of a pretty astonishing variety of sounds during operation.

Most of these are harmless, like the sound of the air handler turning on or the burners igniting. However, there are a few sounds that indicate a problem that needs repair. Intermittent or constant clicking is one of those sounds. Let’s take a look at some of the different factors that can cause clicking with your furnace.

Inducer Blower

Oil furnaces produce a lot more combustion byproducts than more common gas furnaces, including large amounts of thick smoke. For that reason, these kinds of furnaces have inducer blowers that help blow the combustion byproducts into the exhaust flue and out of the house. The blower is similar to the air handler, which circulates air around the house.

It is composed of a motor and fan, both of which can make clicking noises if they get dirty or worn down. If the fan gets a bit loose, it can cause clicking by colliding with nearby parts during operation. Generally, this is one of the least harmful problems associated with furnace clicking. Even so, you should have it checked out by a professional to make sure that everything is ok.

Air Handler Motor

The air handler motor is very similar to the inducer blower, but is installed in all kinds of furnaces. The strain of circulating so much air throughout the house is considerable, and air handler motors are outfitted with lubricated bearings to help them compensate for this strain. As the bearings wear down, however, they can produce grinding and clicking sounds.

This is a more serious problem than the inducer motor, as an air handler motor whose bearings fails can overheat and burn out. If you hear a clicking or grinding coming from your furnace, no matter what kind it is, you should turn the furnace off immediately and call a professional HVAC technician to make sure that everything is alright.

If your furnace is making a clicking sound, call Design Comfort. We provide furnace heating repair services throughout the Sandy area.

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