Why Is My Air Conditioner Making A Noise?

July 26, 2019

Hearing weird 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 major—and expensive—issues later. We're going to help you understand what’s occurring with your air conditioner and what you can do to correct it.

8 Common Air Conditioning Noises

  • Gurgling - Gurgling generally indicates an issue with your refrigerant line. If you can't determine where the noise is emanating from, that's alright. A technician can help determine where this noise is occurring. You can read 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. Aging ductwork can produce noise inside your house. Browse our crackling noise guide for more information.
  • Hissing - Hissing can be caused by a damanged refrigerant line, an internal valve leak or the compressor. Peruse our hissing noise guide for more info.
  • Buzzing - Buzzing is probably an electrical issue. Check out 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. Check out 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. Read our loud noise guide for more information.
  • Humming - Humming can be related to fan motor issues or a busted relay switch. Head to our humming noise guide for more information.

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


Should I keep using my AC 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 almost impossible to answer this question without inspecting your system.

Most of the time, 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 unit. While AC repairs can be stressful and an unexpected cost, it's better to get problems fixed 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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