If your furnace makes a loud humming noise, it can be annoying and concerning. There are several possible reasons for this noise, ranging from minor to severe problems. Here are five potential reasons your furnace is humming loudly. Then, please take a look at our tips on how to fix them.
Dirty Air Filter.
A dirty air filter is one of the most common causes of a loud humming furnace. When the filter becomes clogged with dirt and debris, it can restrict airflow and cause the furnace to work harder than it should. This can lead to a loud humming noise as the furnace struggles to push air through the filter. To fix this issue, replace the air filter with a new one. It’s recommended to replace the filter every 1-3 months, depending on usage.
Another possible reason for a loud humming furnace is loose parts. Over time, the vibration of the furnace can cause screws, bolts, and other details to become loose. This can create a humming noise as the loose parts rattle inside the furnace. To fix this issue, turn off the furnace and inspect all visible parts for looseness. Tighten any loose screws or bolts with a wrench or screwdriver. If the noise persists, it may be necessary to call a professional HVAC technician to inspect and repair the furnace.
Faulty Blower Motor.
One possible reason for a loud humming furnace is a faulty blower motor. The blower motor is responsible for circulating warm air throughout your home. It can create a loud humming noise if it becomes damaged or worn out. To check if this is the issue, turn off the furnace and inspect the blower motor for visible damage or wear. If you notice any problems, it may be necessary to replace the blower motor or call a professional HVAC technician for assistance.
Blocked Air Vents.
Another possible reason for a loud humming furnace is blocked air vents. When air vents become blocked, it can cause the furnace to work harder to circulate warm air throughout your home, resulting in a loud humming noise. Check all air vents in your home to ensure furniture, rugs, or other objects do not block them. If you find any obstructions, remove them and see if the humming noise subsides. If the issue persists, it may be necessary to call a professional HVAC technician.
If your furnace is humming loudly, it could be due to improper installation. Likewise, if your furnace is not installed correctly, it can cause vibrations and humming noises. This is especially true if the furnace is not level or the ductwork is not properly connected. If you suspect that your furnace was not installed correctly, it’s essential to call us at Lowery! Our professional HVAC technicians inspect and correct any installation issues. Ignoring these problems can lead to further damage and potentially dangerous situations. Contact us at Lowery today to learn more about how we can help!