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Dealing with a Noisy Air Conditioner

Do you hear odd noises coming from your AC system? Noises coming from an air conditioning unit can be due to a number of reasons, depending on the type of unit you have. You should not ignore these noises—they most likely indicate that your unit requires professional AC repair services. In some cases, an air conditioning unit is beyond repair by the time it starts being noisy. This means you’ll need to consider AC replacement as an option.

Homeowners throughout Fairfax, Arlington, Centreville, Reston, and other nearby areas in Northern VA depend on their air conditioning system all throughout the summer months to provide high-quality cooling performance and energy efficiency. A noisy AC unit can indicate poor performance and should be inspected immediately by a professional, well-established HVAC technician.

To learn more about how to tackle a noisy air conditioner, call us at 703-291-1926 or keep reading.

Common Air Conditioner Noises

The most common AC noises along with their likely causes include:


Excessive buzzing is often the result of an electrical problem—usually derived from a circuit overload or damaged wiring. If your outdoor or indoor unit is buzzing, call John Nugent & Sons so a professional can inspect your AC system and prescribe an appropriate solution.


Depending on where exactly they’re coming from, hissing sounds often indicate that the unit is leaking. Two common places that may develop leaks are the unit’s refrigerant coils and ductwork. The AC system’s outdoor compressor unit pressurizes the refrigerant and circulates it through the expansion valve, evaporator coils, and condenser coils. The coils can often be intricate and, while often well protected, they are subject to the same wear and tear as other parts of the system. Ducts are often subject to physical damage, which can lead to twisting and crimping.


The air handler that blows air into your duct system relies on the operation of your blower motor, which has a fan belt. The belt connects to the fan blades—and when it becomes worn or damaged, it can begin to squeal.

Recognizing that there is something wrong with your air conditioning system is the first step to correcting the problem. The next step is calling your dependable HVAC technician! Contact us today for AC services in the Northern VA area.

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