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Hot Air About Some Cool Stuff. Learn how maintenance agreements can help you maintain healthy indoor air quality throughout the year.

4 Alarming Furnace Sounds and What They Mean


Maintenance agreements can prevent a variety of furnace problems, but issues are bound to crop up from time to time. Listen closely for the following noises — they may indicate that it's time to meet with your HVAC technician:

1. Whistle

If your furnace sounds more like a teakettle than an integral part of your home's HVAC system, the problem could be a clogged filter. Occasionally, whistling noises indicate leaky or too-small ducts.

2. Screeching

Screeching and squealing noises are not only annoying; they indicate a need for lubrication on the motor shaft bearings or a failed blower belt.

3. Rattling

Rattling noises are common in homes with children or rodents. From marbles to acorns, a variety of objects can become lodged in the ductwork, making obnoxious rattling noises. A more alarming cause of rattling? Destabilization of the entire furnace. If you suspect that stability issues are to blame, contact your HVAC technician promptly.

4. Thudding or Banging

Loud thuds or booms are always cause for alarm. If your furnace sounds like an elephant, you should be on guard — you may have a real safety hazard on your hands. Issues could include faulty electronic ignition, weak areas in the ductwork, or dirty burners that cause gas buildup. Call an HVAC expert as soon as possible.

If you're alarmed by the above noises, don't hesitate to get in touch with Morelli Heating & Air Conditioning. We're committed to keeping your HVAC system in excellent shape. Connect with our heating and air conditioning experts online today to learn about the benefits of our maintenance agreements.


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