Why Is My Air Conditioner Making A Noise?

July 26, 2019

Hearing weird noises when your air conditioner is on? There's probably something wrong with your unit. If you ignore it, it could lead to significant—and expensive—troubles eventually. We're going to help you find out what’s going on with your air conditioner and what you can do to change it.

8 Common Air Conditioning Noises

  • Gurgling - Gurgling usually indicates a complication 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 learn more information on our gurgling noises guide.
  • Crackling - Crackling could come from debris in the unit or aging ductwork. Debris in the outdoor unit will cause a noise outside your house. Old 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. See our buzzing noise guide for further information.
  • Clicking - Clicking can indicate you have a loose part or that the fan is misaligned. You can see more information in our clicking noise guide.
  • Pulsating - Pulsating can come from a loose part. Go through our pulsating noise guide for more information.
  • Loud Noise - A clear noise from your outdoor unit can mean an issue with your compressor, damper, fan or air handler. Read our loud noise guide for supplementary information.
  • Humming - Humming can begin with fan motor issues or a damaged relay switch. Check out our humming noise guide for more information.

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


Should I keep running my system 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 examining your system.

Usually, 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 system. While AC repairs can be stressful and an unexpected expense, it's better to get problems fixed right away. Calling 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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