Why Is My Air Conditioner Making A Noise?

July 26, 2019

Hearing strange noises when your air conditioner is working? There's probably something wrong with your unit. If you ignore it, it could lead to major—and expensive—problems eventually. 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 generally indicates an issue with your refrigerant line. If you can't pinpoint where the noise is originating from, that's alright. An expert can help find out where this noise is occurring. You can find more information on our gurgling noises guide.
  • Crackling - Crackling could be due to debris in the unit or aging ductwork. Debris in the outdoor unit will generate a noise outside your house. Mature ductwork can produce noise inside your house. Check out our crackling noise guide for more information.
  • Hissing - Hissing can be created by a damanged refrigerant line, an internal valve leak or the compressor. Look through our hissing noise guide for more on that.
  • Buzzing - Buzzing is likely an electrical issue. See 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 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 more information.
  • Humming - Humming can arise from fan motor issues or a damaged relay switch. Read through our humming noise guide for more information.

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


Should I keep running 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 hard to answer this question without examining your system.

Most of the time, we recommend turning 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 an issue with your air conditioner. While AC repairs can be stressful and an unexpected cost, it's best to get problems taken care of right away. Calling a professional could help reduce 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