Why Is My Air Conditioner Making A Noise?

July 26, 2019

Hearing odd noises when your air conditioner is running? There's probably something wrong with your AC. If you don’t fix it, it could lead to significant—and expensive—problems later. We're going to help you find out what’s happening with your air conditioner and what you can do to correct it.

8 Common Air Conditioning Noises

  • Gurgling - Gurgling usually indicates a complication with your refrigerant line. If you can't determine where the noise is coming from, that's alright. A technician can help find out where this noise is occurring. You can find 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. Mature ductwork can cause noise inside your house. Check out our crackling noise guide for more information.
  • Hissing - Hissing can be caused by a damanged refrigerant line, an internal valve leak or the compressor. Check out our hissing noise guide for more on that.
  • Buzzing - Buzzing is no doubt an electrical issue. See our buzzing noise guide for additional 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. Go through our pulsating noise guide for more information.
  • Loud Noise - A loud noise from your outdoor 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 damaged relay switch. Head to our humming noise guide for more information.

You can find additional information about common air conditioning problems 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 difficult to answer this question without examining 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 recognize there's something wrong with your unit. While AC repairs can be stressful and an unexpected spend, it's better to get problems fixed 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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