Why Is My Air Conditioner Making A Noise?

July 26, 2019

Hearing weird noises when your air conditioner is working? 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 going on with your air conditioner and what you can do to fix it.

8 Common Air Conditioning Noises

  • Gurgling - Gurgling normally indicates an issue with your refrigerant line. If you can't pinpoint where the noise is originating from, that's alright. A technician can help determine 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. Old ductwork can create noise inside your house. Check out our crackling noise guide for more information.
  • Hissing - Hissing can be created by a leaky refrigerant line, an internal valve leak or the compressor. Check out our hissing noise guide for more information.
  • Buzzing - Buzzing is likely an electrical issue. Check out our buzzing noise guide for further information.
  • Clicking - Clicking can mean you have a loose part or that the fan is misaligned. You can find more information in our clicking noise guide.
  • Pulsating - Pulsating can be due to a loose part. Go through our pulsating noise guide for more information.
  • Loud Noise - A noticeable noise from your outside unit can mean an issue with your compressor, damper, fan or air handler. Read our loud noise guide for additional information.
  • Humming - Humming can be related to fan motor issues or a damaged relay switch. Check out our humming noise guide for more information.

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


Should I keep operating my air conditioner when it’s making a noise?

There are a few 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.

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 suspect there's something wrong with your unit. While AC repairs can be stressful and an unexpected spend, it's better to get problems corrected right away. Getting 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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