Why Is My Air Conditioner Making A Noise?

July 26, 2019

Hearing strange noises when your air conditioner is on? There's probably something wrong with your AC. If you ignore it, it could lead to significant—and expensive—troubles down the road. We're going to help you find out what’s occurring with your air conditioner and what you can do to fix it.

8 Common Air Conditioning Noises

  • Gurgling - Gurgling usually indicates a problem with your refrigerant line. If you can't pinpoint where the noise is coming from, that's alright. A professional 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 generate a noise outside your house. Old ductwork can create noise inside your house. Browse our crackling noise guide for more information.
  • Hissing - Hissing can be created by a damanged refrigerant line, an internal valve leak or the compressor. Peruse our hissing noise guide for more information.
  • Buzzing - Buzzing is no doubt an electrical issue. Read 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. Take a look at our pulsating noise guide for more information.
  • Loud Noise - A loud noise from your external unit can mean 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 busted relay switch. Read through our humming noise guide for more information.

You can find additional information about common air conditioning problems on energy.gov


Should I keep operating 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 almost impossible to answer this question without inspecting your system.

Usually, we recommend turning 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 suspect there's a problem with your system. While AC repairs can be stressful and an unexpected expense, it's smart to get problems corrected right away. Contacting a professional could help minimize 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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