Why Is My Air Conditioner Making A Noise?

July 26, 2019

Hearing weird noises when your air conditioner is running? There's probably something wrong with your system. If you don’t fix it, it could lead to significant—and expensive—problems eventually. We're going to help you understand what’s occurring 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 determine where the noise is originating 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 be due to debris in the unit or aging ductwork. Debris in the outdoor unit will create a noise outside your house. Aging ductwork can produce noise inside your house. Browse our crackling noise guide for more information.
  • Hissing - Hissing can come from a leaky refrigerant line, an internal valve leak or the compressor. Look through our hissing noise guide for more info.
  • Buzzing - Buzzing is no doubt an electrical issue. Check out our buzzing noise guide for more information.
  • Clicking - Clicking can mean 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. Check out our pulsating noise guide for more information.
  • Loud Noise - A noticeable noise from your external unit can signal an issue with your compressor, damper, fan or air handler. Read our loud noise guide for supplementary information.
  • Humming - Humming can arise from fan motor issues or a busted relay switch. Read through our humming noise guide for more information.

You can find further information about frequent air conditioning problems on energy.gov


Should I keep using my system 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 looking at 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 recognize there's an issue with your system. While AC repairs can be stressful and an unexpected cost, it's smart to get problems corrected right away. Getting 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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