Why Is My Air Conditioner Making A Noise?

July 26, 2019

Hearing odd noises when your air conditioner is working? There's likely something wrong with your AC. If you ignore it, it could lead to significant—and expensive—issues eventually. We're going to help you understand what’s going on with your air conditioner and what you can do to change it.

8 Common Air Conditioning Noises

  • Gurgling - Gurgling generally indicates an issue with your refrigerant line. If you can't identify where the noise is emanating from, that's alright. A professional can help verify where this noise is occurring. You can read more information on our gurgling noises guide.
  • Crackling - Crackling could come from debris in the unit or aging ductwork. Debris in the outdoor unit will cause a noise outside your house. Aging ductwork can create noise inside your house. Browse our crackling noise guide for more information.
  • Hissing - Hissing can be caused by a leaky refrigerant line, an internal valve leak or the compressor. Peruse our hissing noise guide for more information.
  • Buzzing - Buzzing is probably an electrical issue. Check out our buzzing noise guide for further information.
  • Clicking - Clicking can mean you have a loose part or that the fan is misaligned. You can find more information in our clicking noise guide.
  • Pulsating - Pulsating can be due to a loose part. Check out our pulsating noise guide for more information.
  • Loud Noise - A noticeable noise from your external unit can indicate an issue with your compressor, damper, fan or air handler. Check out our loud noise guide for supplementary information.
  • Humming - Humming can arise from fan motor issues or a damaged relay switch. Head to our humming noise guide for more information.

You can find more information about prevalent air conditioning problems on energy.gov


Should I keep running my AC when it’s making a noise?

There are limited cases where you can continue to run your AC, but you do so at your own risk. It's almost impossible to answer this question without inspecting your system.

Usually, we recommend shutting down the unit off and calling a professional.

When should I do something about the noise?

We recommend calling a professional as soon as you think there's an issue with your unit. While AC repairs can be stressful and an unexpected expense, it's better to get problems corrected right away. Calling a professional could help reduce future expenses and keep your system running longer.

Not sure if your air conditioner is making any of these noises? Please fill out the form below for a free, in-home consultation.

Contact Us