Why Is My Air Conditioner Making A Noise?

Hearing odd noises when your air conditioner is working? There’s probably something wrong with your AC. If you don’t fix it, it could lead to significant—and expensive—problems later. We’re going to help you figure out what’s happening 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 coming from, that’s alright. A technician 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 cause a noise outside your house. Aging ductwork can create noise inside your house.
  • Hissing – Hissing sounds coming from your AC can be caused by a damanged refrigerant line, an internal valve leak or the compressor.
  • Buzzing – Buzzing is no doubt an electrical issue.
  • Clicking – Clicking can hint you have a loose part or that the fan is misaligned.
  • Pulsating – Pulsating can be caused by a loose part.
  • Loud Noise – A noticeable noise from your external unit can signal an issue with your compressor, damper, fan or air handler.
  • Humming – Humming can be related to fan motor issues or a busted relay switch. Read through our humming noise guide for more information. 

You can find more information about common air conditioning issues on energy.gov 

Should I keep using my AC 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 looking at your system. 

In most cases, 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 recognize there’s a problem with your air conditioner. While AC repairs can be stressful and an unexpected spend, it’s best to get problems taken care of 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. 

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