Why Is My Air Conditioner Making A Noise?

July 26, 2019

Hearing strange noises when your air conditioner is working? There's likely something wrong with your AC. If you don’t pay attention to it, it could lead to extensive—and expensive—troubles eventually. We're going to help you figure out what’s occurring with your air conditioner and what you can do to fix it.

8 Common Air Conditioning Noises

  • Gurgling - Gurgling usually indicates a problem with your refrigerant line. If you can't pinpoint where the noise is originating from, that's alright. An expert can help verify where this noise is occurring. You can find more information on our gurgling noises guide.
  • Crackling - Crackling could be due to debris in the unit or aging ductwork. Debris in the outdoor unit will generate a noise outside your house. Mature ductwork can cause 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. Check out our hissing noise guide for more information.
  • Buzzing - Buzzing is no doubt an electrical issue. Read our buzzing noise guide for more information.
  • Clicking - Clicking can hint 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 loud noise from your outside unit can indicate an issue with your compressor, damper, fan or air handler. Check out our loud noise guide for additional information.
  • Humming - Humming can arise from fan motor issues or a busted relay switch. Check out our humming noise guide for more information.

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


Should I keep operating 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 difficult to answer this question without looking at 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 suspect there's a problem with your air conditioner. While AC repairs can be stressful and an unexpected spend, it's better to get problems taken care of right away. Getting a professional could help minimize 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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