7 Most Common Furnace Sounds And What They Mean

It is normal for a furnace to make a light clicking or popping sound when it starts up, which may eventually settle into a dull humming sound. However, if the furnace starts to make loud, unusual noises, it could be an indication of an impending problem. Familiarizing oneself with the different types of furnace sounds and their potential causes can help identify and address issues before they become more serious.

Scraping Sound

This noise may indicate a problem with the blower wheel and could sound like metal rubbing against metal. It could be caused by a broken fan or a loose fan pounding against the blower casing. If you hear this noise, turn off your furnace and contact a HVAC companies Lawrenceville GA to fix the issue. Ignoring the problem could lead to further wear and tear and the potential need for a blower fan replacement.

Squealing and Screeching Sound

The bearings on the blower motor of a furnace require regular lubrication. If lubrication is lacking, the bearings may become dry and cause a squealing or screeching sound. You can try lubricating the blower fan to fix the issue. If the problem persists, it could be due to a broken blower fan belt, which will need to be replaced by a furnace repair expert to prevent further damage to your furnace.

Whistling Sound

This high-pitched noise can be caused by an issue with the blower motor, such as low airflow. To fix the issue, try changing your air filter or opening all vents. If these measures don’t work, contact a heating repair expert for further assistance.

Banging and Popping Sound

It is normal for a furnace replacement Lawrenceville GA  to solve mild banging and popping sounds due to the expansion and contraction of the ducts. However, if the sounds become excessively loud or occur more frequently, it could be a sign of a major problem with your furnace. Possible causes include ductwork issues or dirty burners that delay ignition. Ignoring loud banging and popping noises could lead to cracks in the heat exchanger.

Rattling Sound

A rattling sound may be caused by loose furnace panels or doors that are not properly closed. It could also be due to a loose screw or other loose part. To fix the issue, try tightening the screws or parts while the furnace is off. If you are unsure how to do this, contact a furnace repair expert. In rare cases, a rattling sound may also be caused by a crack in the heat exchanger.

Rumbling Sound

During normal operation, a furnace may make a roaring or slight whoosh sound when it completes a cycle. However, if you hear a loud rumbling sound, it could be a cause for concern. It could be caused by dirty burners blocking airflow, a dirty draft inducer motor, or a crack in the heat exchanger.

Clicking Sound

If you hear a clicking sound, it could be due to the spark igniter repeatedly trying to ignite the burner or pilot light but being unable to do so. The issue could be caused by a faulty ignition board or sensor, or a malfunctioning gas valve. If you hear this sound, contact a furnace repair Lawrenceville GA to have the issue fixed as soon as possible.

Ignoring unusual furnace sounds can lead to various problems, so it is advisable to schedule a furnace repair as soon as you notice any unusual sounds. If you are in need of a heating repair expert in Atlanta, consider reaching out to JE Mechanical. We are a trusted provider of residential and commercial HVAC services in Alpharetta, Atlanta, and surrounding areas. To schedule a repair, contact us at 470-239-1411 or email us at office@jemechanical.com.

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