Why Is My Air Conditioner Making A Noise?

July 26, 2019

Hearing odd noises when your air conditioner is running? There's likely something wrong with your system. If you don’t pay attention to it, it could lead to significant—and expensive—issues down the road. We're going to help you find out 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 pinpoint where the noise is originating 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 result from debris in the unit or aging ductwork. Debris in the outdoor unit will generate a noise outside your house. Mature ductwork can produce noise inside your house. Check out our crackling noise guide for more information.
  • Hissing - Hissing can come from a damanged refrigerant line, an internal valve leak or the compressor. Look through our hissing noise guide for more on that.
  • Buzzing - Buzzing is likely an electrical issue. Check out our buzzing noise guide for more 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 due to a loose part. Take a look at our pulsating noise guide for more information.
  • Loud Noise - A clear noise from your outside unit can indicate an issue with your compressor, damper, fan or air handler. Read our loud noise guide for more information.
  • Humming - Humming can begin with fan motor issues or a busted relay switch. Read through our humming noise guide for more information.

You can find more information about frequent air conditioning issues on energy.gov


Should I keep using my air conditioner 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 looking at your system.

In most cases, we recommend shutting off 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 think there's something wrong with your unit. While AC repairs can be stressful and an unexpected spend, it's best to get problems taken care of right away. Contacting a professional could help lower 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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