Why Is My Air Conditioner Making A Noise?

July 26, 2019

Hearing odd noises when your air conditioner is on? There's probably something wrong with your system. If you don’t fix it, it could lead to extensive—and expensive—problems down the road. We're going to help you understand what’s happening with your air conditioner and what you can do to fix it.

8 Common Air Conditioning Noises

  • Gurgling - Gurgling generally indicates a complication with your refrigerant line. If you can't identify where the noise is coming from, that's alright. A technician can help find out where this noise is occurring. You can learn 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 generate a noise outside your house. Aging ductwork can create noise inside your house. Read our crackling noise guide for more information.
  • Hissing - Hissing can be created by a faulty refrigerant line, an internal valve leak or the compressor. Look through our hissing noise guide for more on that.
  • Buzzing - Buzzing is no doubt 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 come from a loose part. Take a look at our pulsating noise guide for more information.
  • Loud Noise - A clear noise from your external unit can mean an issue with your compressor, damper, fan or air handler. Look at our loud noise guide for more information.
  • Humming - Humming can arise from fan motor issues or a damaged relay switch. Read through our humming noise guide for more information.

You can find further information about common air conditioning troubles on energy.gov


Should I keep using my system 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 hard to answer this question without inspecting your system.

Usually, we recommend shutting off the unit off and contacting 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 air conditioner. While AC repairs can be stressful and an unexpected expense, it's smart to get problems taken care of right away. Getting 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.

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