Reasons Why Your AC is Making Noises

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Reasons Why Your AC is Making Noises

two outdoor ac units

Noise coming from an air conditioner can be concerning as it may indicate a problem with the system. Air conditioners typically make a light humming noise when operating normally, but other more noticeable noises, such as grinding, buzzing, rattling, or clicking, could signify a more significant issue.

Read on to learn why certain sounds may come from your AC unit.

Concerning Noises From Your Air Conditioner

As shared, it's normal for air conditioners to make some noise, but if you notice any sounds that seem out of the ordinary, it may be worth further investigation.

Rattling and Buzzing

Several different issues may cause this sound. It could indicate that your air conditioner's fan motor is failing or could be due to misaligned fan blades or loose screws in the unit. Alternatively, it could be caused by something blocking the airflow, such as dirt and debris buildup in the system.


Grinding noises coming from your air conditioner can be a sign of several potential problems. Diagnosing and addressing the issue as soon as possible is essential, as it could cause severe damage to your system if left unchecked.

The most common cause of a grinding noise in an air conditioner is loose or worn-out fan blades. As the fan blades spin, they can cause vibrations that generate a grinding sound as they rub against nearby components. This issue is relatively easy to fix; replacing or tightening loose fan blades should do the trick.

In more serious cases, a grinding noise could be caused by an issue with the compressor. Compressors are the main components of your air conditioner's cooling system and can wear out over time. If your compressor is the source of the grinding noise, it will need to be replaced. This is a more complicated repair that should be done by a professional.

Finally, there are some other potential causes for grinding noises coming from an air conditioner. These include issues with the blower fan, worn-out bearings, or a lack of lubrication in the system. All of these problems will require professional help to diagnose and fix.

If you hear a grinding noise coming from your air conditioner, it is crucial to address the issue quickly before it causes any further damage.

How to Fix a Noisy Air Conditioner

The first thing to do when dealing with an air conditioner making noises is to identify the source of the sound. Is the sound coming from the condenser unit outside or from inside the house? If outside, it could be due to an obstruction in the blades, while if inside, it may be a loose part or clogged filter.

Once you have pinpointed the noise source, you can start troubleshooting possible causes. This can range from cleaning and repairing parts on a DIY basis, such as checking and/or changing air filters, to more serious complications, such as electrical faults that may require a call to a trained professional. Regardless of how daunting identifying and fixing an AC seems at first, taking the time to get acquainted with your system properly is sure to help resolve any issues so that you can enjoy peace and quiet once more.

When Should I Call a Professional?

Deciding to call a professional can be difficult. It's always best to research different options before proceeding with a particular service. This can save you time and money in the long run, ensuring you get the best value for your dollar.

When searching for an air conditioning repair or replacement technician, know that Jackson Plumbing, Heating & Cooling is ready to help you. With decades of experience, we know the best approach to fix your air conditioning problems. Schedule an appointment online or by phone so we can help you feel comfortable in your home again.

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