Why Is My Air Conditioner Making A Noise?

July 26, 2019

Hearing odd noises when your air conditioner is running? There's a strong probability there’s something wrong with your AC. If you ignore it, it could lead to extensive—and expensive—issues eventually. 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 usually indicates a problem with your refrigerant line. If you can't determine where the noise is coming from, that's alright. A technician can help verify where this noise is occurring. You can read 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 produce noise inside your house. Read our crackling noise guide for more information.
  • Hissing - Hissing can come from a damanged refrigerant line, an internal valve leak or the compressor. Peruse our hissing noise guide for more information.
  • Buzzing - Buzzing is probably an electrical issue. Read our buzzing noise guide for more 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 be due to a loose part. Check out our pulsating noise guide for more information.
  • Loud Noise - A clear noise from your outdoor unit can signal an issue with your compressor, damper, fan or air handler. Read our loud noise guide for supplementary information.
  • Humming - Humming can be related to fan motor issues or a broken relay switch. Read through our humming noise guide for more information.

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


Should I keep operating my air conditioner 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 down 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 a problem with your system. While AC repairs can be stressful and an unexpected cost, it's best to get problems corrected right away. Getting 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.

Contact Us