You depend on your furnace to keep your warm, so it can be very unsettling to hear strange furnace noises. Unusual furnace noises could indicate that a serious problem is developing, so consider calling an HVAC professional if you have concerns.
Here are three furnace noises you might be hearing that can put your system at risk:
- Squealing: This furnace noise has two potential causes. First, it could be a slipping blower belt. Like a car, you should have loose or fraying belts tightened or replaced by a knowledgeable technician before they snap and cause more damage. The second possible cause is that the shaft bearings need to be oiled. Once a technician adds lightweight oil to the lubrication ports at the end of each shaft, this noise should stop.
- Rumbling: If you hear a low-pitched rumbling when the burners are on, the burners are probably dirty. This is a common occurrence because the gas burners are located beneath the flame where debris falls and collects over time. A simple, inexpensive cleaning and adjustment should stop the sound and prevent further damage to your furnace. If the low-pitched rumbling happens when the burners on off, the pilot light may simply require an adjustment. An experienced technician can make this adjustment easily and get your furnace up and running again quickly.
- Scraping: The most common cause of this furnace noise is that the motor bearings are wearing out. This could cause serious problems if left unaddressed. If you ever hear scraping furnace noises, turn off the system immediately and call a technician for service.
Remember, these are merely possible causes for strange furnace noises, which is why your mind can be put at ease by a visit from a heating and cooling technician. Contact us at Smoky Mountain Heating & Air today if your furnace is making any strange noises. Our years of experience ensure you receive quality service every time.
Our goal is to help educate our customers about energy and home comfort issues (specific to HVAC systems). For more information about furnace noises and other HVAC topics, download our free Home Comfort Resource guide.
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