Why Is My AC Making Noise?

Man closing his ears because of AC making loud noise.

Have you ever found yourself puzzled by strange sounds coming from your air conditioning unit? Whether it’s a buzzing sound, a rattling noise, or a loud humming noise, these unwelcome disturbances can be more than just annoying — they often indicate underlying issues with your air conditioning system. 

At Gagne Heating & Air Conditioning, we specialize in diagnosing and fixing all types of air conditioner noises. From AC repair to complete air conditioning installation and replacement, our team is ready to restore peace and comfort to your home. If you’re dealing with a noisy air conditioner that is keeping you up at night or making you wonder what’s wrong, don’t hesitate to reach out to us for professional assistance.

Common Types of Air Conditioner Noises and Their Causes

Understanding the various sounds your AC unit might make is crucial in determining the cause and finding a solution. Here are some common noises and what they typically signify:

Buzzing Noises

A buzzing noise from your air conditioner can be caused by several issues. Loose parts are a common culprit, as over time, parts can become loose, leading to buzzing sounds as they vibrate. This can also happen when a frozen unit starts to thaw.

Electrical problems are another potential cause; faulty wiring or issues with the electrical components can produce a buzzing noise. 

Rattling Noises

Rattling sounds often signal that something is loose or out of place. This could be as simple as loose screws or panels that need tightening. Debris, such as leaves, twigs, or other materials, can get lodged in the unit, causing a rattling noise. Issues with the fan motor can also lead to rattling sounds.

Banging Noises

A banging noise usually indicates a more serious problem. Loose or broken parts inside the compressor or fan motor can produce a banging noise, signaling the need for immediate attention. Motor problems, such as an out-of-balance or malfunctioning motor, can also cause banging sounds.

Squealing Noises

Squealing noises are typically associated with belt issues, especially in older air conditioning units. These belts can slip or become misaligned, producing a squealing noise. Worn-out motor bearings can also cause a high-pitched squealing noise, indicating the need for replacement.

Hissing Noises

A hissing noise often points to refrigerant leaks, which require immediate attention. High internal pressure within the system can also cause hissing sounds, signaling a need for professional inspection and repair.

Troubleshooting Tasks

When your air conditioner starts making strange noises, it’s crucial to address the issue right away to prevent further damage. You can safely perform several troubleshooting tasks on your own to identify and potentially fix the issue. Start by inspecting the exterior of your air conditioning unit for any visible damage or debris and clear away any obstructions that might have accumulated around or inside the unit. Check for loose screws or panels and use a screwdriver to tighten them, as loose panels can cause buzzing or rattling noises. 

Additionally, examine the air filter; a dirty or clogged filter can restrict airflow, causing the unit to work harder and produce unusual noises. Remove the air filter and clean it or replace it with a new one. Regularly maintaining a clear area around your AC unit and ensuring the air filter is clean can significantly reduce noise issues.

If you hear a buzzing sound, it might be due to electrical issues. While it’s best to leave electrical problems to professionals, you can safely check the thermostat wires for any signs of wear or damage. Turn off the power to the unit, inspect the wires, and see if they are securely connected. For mechanical checks, turn off the power and examine the fan blades for any signs of damage or obstructions. 

While these steps can help address common air conditioner noises, persistent issues or performance problems should be handled by a professional so your system operates without a hitch.

When to Call a Professional

If your heat pump, central air conditioning system, or ductless mini-split is still making loud noises after your troubleshooting attempts, there is likely a more severe issue going on that warrants an expert touch. Here are some additional instances that should prompt you to pick up the phone:

  • You discover bent or damaged blades
  • You discover a refrigerant leak
  • You notice an unexpected spike in your energy bills
  • You experience frequent breakdowns of your AC

The Importance of Professional AC Services

Choosing professional services for your air conditioning repair and maintenance offers several benefits. Our technicians have the expertise to diagnose and fix a wide range of air conditioner noises and issues. 

Air conditioning systems involve complex electrical and mechanical components, and trained specialists follow safety protocols to prevent accidents and guarantee safe performance. Our crew delivers comprehensive solutions that address both the symptoms and the root cause of the problem for long-term comfort and dependability.

Air Conditioner Making Non-Stop Noise? Reach Out Today

If your air conditioner is making excessive noise and you’ve tried everything to get it to stop, contact us right away. Fast action can be the difference between a small tweak or getting a new air conditioner. Our team always recommends and performs the most cost-effective repairs, so you don’t have to worry about burning a hole through your wallet trying to get the cool air you deserve.

We are available to provide AC services in Alpharetta, GA and the surrounding areas like Cumming, Rosewell, Johns Creek, and many more!