At Southern Comfort Heating, Cooling, and Gas, we understand that the familiar hum of household appliances like the dishwasher, dryer, and air conditioner often becomes background noise, even offering a sense of tranquility. However, when an unusual sound interrupts this calm, it can be both alarming and concerning. If you're reading this, the unfamiliar clanging, buzzing, or screeching noises might be coming from your heater or air conditioner.
To be clear: any unusual noises from your HVAC system strongly suggest that a repair is necessary. HVAC equipment should operate quietly. If your system is producing sounds that seem out of the ordinary, it’s essential to have a professional assess the situation. Even if your unit continues to keep your home comfortable, these noises indicate underlying issues that won’t resolve on their own. Addressing these problems promptly can prevent them from escalating into more significant repairs. When you reach out to a professional, it’s helpful to specify whether the noise is constant or intermittent.
Banging, Thumping, or Rattling Noises
Rattling, banging, or thumping noises are common and can be caused by various factors. Identifying the exact issue without an in-person inspection is difficult.
If these sounds are coming from above your ceiling, it might be a problem with the ductwork. Over time, ducts can degrade or may not have been installed properly, leading to unusual noises. An imbalance in air pressure within your ducts might also be a factor, and duct sealing could resolve this.
If you believe the noise is originating from your equipment, a loose component is often to blame. Loose parts can rattle during operation due to vibrations. While tightening a component might resolve the issue, it’s best left to a professional. An experienced HVAC technician will also inspect for other parts that might need tightening or lubrication as a precaution.
Screaming or Squealing Noises
High-pitched screeching or squealing sounds are the second most frequent issue and can be particularly annoying. If your system is making these noises, it might be nearing the end of its lifespan.
Older air conditioning units with belt-driven motors—common in units from 10-20 years ago—often produce a squealing sound when the belt loosens. Replacing the belt can resolve this issue, and we’re here to assist with that. If your unit is over a decade old, consider upgrading to a new system. A new unit can greatly improve your comfort and reduce the need for frequent repairs.
If the squealing is not due to a loose belt, it could indicate a problem with the fan motor bearings or the compressor. We strongly recommend having a NATE-certified technician examine this issue. Such noises are not typical! Call us for a repair today.
Buzzing, Vibrating, and Rumbling Noises
Buzzing and vibrating often suggest an electrical issue. Potential causes include faulty wiring, motors, or problems with the circuit breaker connection.
Of all the noises, electrical issues should be addressed immediately. Contact a trusted professional like Southern Comfort Heating, Cooling, and Gas to investigate.
Discuss Your HVAC Noises with Us!
We’ve heard every noise you can imagine! Call us with a detailed description of the sound—whether it's hissing, bubbling, screeching, squealing, buzzing, clicking, banging, or vibrating. You can even record a video on your phone and text it to us at 910-922-4264. Understanding the noise helps us prepare for a prompt and effective repair.
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