When you hear noises coming from the AC system in your Moncks Corner, South Carolina, home, you may think it’s just part of having an aging system. Unfortunately, the noises your AC unit makes is its way of telling you that something is wrong. Here are some of the AC noises you may hear that you should never disregard.


Squealing noises coming from the inside of your air conditioner is often a sign that the internal pressure is too high. When your system has high internal pressure, it becomes a dangerous system. Most AC systems have a sensor that shuts down the system when the pressure gets too high, but it can sometimes fail. If you detect a squealing noise, shut your system down right away and contact an HVAC professional.


A hissing noise is often a sign of a refrigerant leak coming from your air conditioner. Leaks occur most commonly in a line or a coil. Leaks can lead to inefficient cooling, but they can also produce harmful chemicals that can be dangerous when humans are exposed to them. Never try to handle a leak on your own. Refrigerant leaks require a professional to repair and refill.


Buzzing noises coming from any part of your HVAC system is a sign of an electrical issue in the system. It could be a relay switch, faulty wiring, a bad condenser fan motor, or another electrical failure. Electrical issues can be fire hazards, so if you suspect such an issue, you should shut down the system until your technician arrives.


If you hear a rattling noise in your system, it’s likely that you have a loose part somewhere inside the unit. It could be something as simple as a screw or a cover plate, or it could be something more complex, such as a fan blade.

If you hear any of the noises above, contact Coastal Air Solutions at (843) 482-0407 immediately. One of our technicians will get your system repaired and back up and running in no time.

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