Why Is My Air Conditioner Making A Noise?

Hearing odd noises when your air conditioner is running? There’s a strong probability there’s something wrong with your unit. If you don’t fix it, it could lead to significant—and expensive—problems eventually. We’re going to help you understand 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 a complication with your refrigerant line. If you can’t identify where the noise is originating from, that’s alright. An expert can help find out where this noise is occurring.
  • 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 produce noise inside your house.
  • Hissing – Hissing sounds coming from your AC can be created by a damanged refrigerant line, an internal valve leak or the compressor.
  • Buzzing – Buzzing is likely an electrical issue.
  • Clicking – Clicking can hint you have a loose part or that the fan is misaligned.
  • Pulsating – Pulsating can come from a loose part.
  • Loud Noise – A noticeable noise from your outdoor unit can signal an issue with your compressor, damper, fan or air handler.
  • Humming – Humming can begin with fan motor issues or a broken relay switch. Head to our humming noise guide for more information. 

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

Should I keep using my system when it’s making a noise? 

There are limited 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. 

Usually, 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 recognize there’s something wrong with your air conditioner. While AC repairs can be stressful and an unexpected spend, it’s best to get problems fixed right away. Contacting 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 schedule online for a free, in-home consultation.