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Blue Ash, Ohio 45241
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The National Difference: Longest running Bryant dealer in Cincinnati

Why Is My Air Conditioner Making So Much Noise?

Modern cooling systems can operate silently, except for when something goes wrong. In fact, when you notice your AC making noise—like whistling, banging, or grinding sounds—that’s usually a telltale sign that something’s gone wrong.

The good news is that different sounds from air conditioning systems can mean different problems. So, if you know what type of noise you’re hearing, you may be able to figure out what’s wrong with your cooling system.

And whenever you can’t or you need some expert help, just call National Heating and Air Conditioning. We’re here to help you with AC troubleshooting and repairs, no matter what sounds your cooling system may be making.

Until then, here’s a look at some common noises AC systems make and what those noises typically indicate.

Shrill Squeaks & Squealing

Loud, squeaky noises from your air conditioning system will most commonly mean that the fan belt that operates the blower assembly has slipped, snapped, or is wearing out. The sound may also be from the fan bearings loosening.

These are all fairly common problems that air conditioners experience and that an experience AC repair technician can fix.

Grinding or Banging Noises

These sounds are often the loudest and most jarring noises that come from cooling systems. When you notice these noises, it’s usually a sign of loose or damaged components clanking around in the unit. If the components causing these sounds aren’t fixed quickly, they can cause more extensive damage.

To prevent the need for AC replacement, call for professional service as soon as you notice these sounds coming from your air conditioner.

Humming, Ticking & Buzzing

You may be used to hearing your cooling system tick a few times in rapid succession when it cycles on, especially if you have an older central AC unit or a heat pump. If the sound persists long after the system’s started up, however, there could be problems with:

  • Electrical components
  • The thermostat

Either way, it’s best to contact an HVAC expert for help diagnosing and fixing the problem. The issues that cause these strange AC noises can result in higher system operating costs at best—and system failures at worst.

Chattering & Fluttering

If you hear sounds similar to a playing card stuck in the spokes of a bicycle, you probably have debris in your cooling system. Both the indoor and outdoor AC units have fans that can easily collect dust and debris over time.

So, if you notice these sounds, turn your system off. Then, look around and, to the extent possible, look inside the system for any noticeable debris.

If you recently had maintenance done on your system, this sound may also indicate a loose or unseated fan, which will require professional service.

Hissing & “Screaming” Noises

Hissing and screaming noises are generally associated with the loss of pressure from some part of an AC system. If these noises are accompanied by a strange odor, that may mean refrigerant line problems and leaks. And when that happens, professional AC repair service will be critical.

Contact National for AC Repair in Cincinnati, Ohio

The trained, experienced HVAC professionals at National Heating and Air Conditioning can troubleshoot and repair any problems your air conditioner has. We offer repair service for all types, makes, and models of cooling systems, and we’re ready to respond to your needs quickly to restore your comfort and your cooling system.

Schedule AC repair service now by calling (513) 621-4620 or contacting us online now!

Once we get your system back up and running, we can keep it in peak condition with our exceptional AC maintenance service.


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The information on this website is for informational purposes only; it is deemed accurate but not guaranteed.
It does not constitute professional advice. All information is subject to change at any time without notice. Contact us for complete details.