Why Is My Air Conditioner Making A Noise?

July 26, 2019

Hearing odd noises when your air conditioner is working? There's probably something wrong with your system. If you don’t fix it, it could lead to major—and expensive—troubles later. We're going to help you figure out what’s occurring with your air conditioner and what you can do to change it.

8 Common Air Conditioning Noises

  • Gurgling - Gurgling usually indicates an issue with your refrigerant line. If you can't identify where the noise is coming from, that's alright. An expert can help find out where this noise is occurring. You can find more information on our gurgling noises guide.
  • Crackling - Crackling could result from debris in the unit or aging ductwork. Debris in the outdoor unit will create a noise outside your house. Old ductwork can cause noise inside your house. Browse our crackling noise guide for more information.
  • Hissing - Hissing can be created by a faulty refrigerant line, an internal valve leak or the compressor. Peruse our hissing noise guide for more on that.
  • Buzzing - Buzzing is likely an electrical issue. See our buzzing noise guide for additional information.
  • Clicking - Clicking can hint you have a loose part or that the fan is misaligned. You can check out more information in our clicking noise guide.
  • Pulsating - Pulsating can be caused by a loose part. Go through our pulsating noise guide for more information.
  • Loud Noise - A loud noise from your outdoor unit can signal an issue with your compressor, damper, fan or air handler. Look at our loud noise guide for supplementary information.
  • Humming - Humming can begin with fan motor issues or a busted relay switch. Check out our humming noise guide for more information.

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


Should I keep using my air conditioner when it’s making a noise?

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

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

When should I do something about the noise?

We recommend calling a professional as soon as you recognize there's something wrong with your unit. While AC repairs can be stressful and an unexpected spend, it's better to get problems corrected right away. Contacting 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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