If your furnace is more than 15 years old, it might start making strange noises. You might also notice cold spots in certain areas of your home. Both of these symptoms are telltale signs that your furnace probably needs repair or replacement.

Strange Noises Coming From Your Furnace

When your furnace starts making loud or unfamiliar noises, don’t panic, but do take them seriously. A sound like scraping metal might indicate a loose or broken blower wheel. If you hear a pronounced whining sound, the blower motor or belt may be damaged, or the shafts may require lubrication. A very loud humming or vibration can mean loose footings or a failing blower.

Loud banging or popping noises may startle you, but they are no cause to panic. Furnace ducts are made of metal that expand and contract when your furnace turns on and off. Ducts that are too small sometimes cause this type of sound. In addition, over time, your furnace may accumulate dirt that blocks the ignition process, causing gas to build up. The process of gas pushing through the dirt can cause a loud bang or tiny explosion. If this issue is not addressed in a timely fashion, the heat exchanger could crack.

Cold Spots in Your Home

Sections of your home that are markedly colder than others may also indicate a furnace issue. A furnace that needs replacement or repair won’t heat as efficiently as one in good working condition. In fact, you may notice that the blower turns on and off frequently or emits cold air. Abnormally cold sections of your home are a prime indication of a failing heater.

While they are not necessarily signs of imminent danger, letting unusual furnace sounds or cold spots in your house go unchecked means more wear and tear on furnaces of any age. For more information about furnace maintenance or replacement, check out Ray’s HVAC or call 847-637-5287.

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