5 Worrisome Ductless AC Sounds in Manteo, NC

June 25, 2025

One of the most appealing features of ductless air conditioners is their silent operation, which is why many Manteo, NC, homeowners choose them. When you start hearing strange noises coming from the system during its operation, something is wrong. Learn more about five worrisome ductless AC sounds and what they mean.

Rattling

Rattling sounds generally mean that you have one or more loose components. When a piece becomes loose, it rattles against other parts, generating this noise. Depending on the component and how loose it is, rattling can quickly turn to banging noises, especially if you fail to address such issues in a timely manner.

Hissing

Your ductless AC system relies on a chemical called refrigerant to change the temperature of air before pushing it into your home. Refrigerant flows through a network of tiny tubes. Over time, those tubes can suffer damage. When refrigerant, which is under a lot of pressure, starts to leak from those lines, you’ll hear a hissing or whistling sound.

It’s important to call for professional repair as soon as you notice this noise. Not only is it unsafe for untrained, unlicensed individuals to handle refrigerant, but it’s also illegal.

Buzzing

Another surefire sign that you need immediate ductless repairs is the presence of buzzing noises. In virtually every case, buzzing sounds point to electrical problems. These problems make it harder for your ductless AC system to cool your space while also increasing the likelihood of a fire, which can cause property damage or significant injury.

Squealing

It won’t take you long to notice a high-pitched squealing noise coming from your ductless system. Generally, these noises result from problems with a worn-out belt or a faulty fan motor.

Gurgling

Finally, you may notice gurgling sounds if something is wrong with the drain line. The drain line carries condensation away from your home, preventing water damage. When that line has a clog in it, you’ll notice gurgling sounds when water tries to get through.

When you notice strange sounds while your system operates, you must get help immediately. Call North Beach Services Heating and Cooling today to find out more about our HVAC services, including mini-split repairs and replacements.

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