Identify strange AC sounds
Why Is My Air Conditioner Making a Loud Noise?
A properly functioning air conditioner should run quietly. If your AC is making unusual noises, it could indicate a mechanical problem, loose components, or airflow issues. Identifying the cause early can prevent costly damage.
Types of AC Noises and What They Mean
Different sounds point to different problems. Banging might mean a broken part, while hissing could indicate a refrigerant leak. Recognizing these signs can help you take action before the issue worsens.

Common AC Noises and Their Causes
- Banging or Clanking: Loose or broken components inside the compressor.
- Hissing or Bubbling: A refrigerant leak in the coils or line.
- Squealing or Screeching: A worn-out fan belt or motor bearings.
- Clicking Sounds: Electrical problems such as a faulty relay switch.
How to Fix a Noisy AC
If your AC is making loud noises, turn it off immediately to prevent further damage. Check for any visible loose parts or obstructions, and call an HVAC technician if the noise continues.