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 system. If you ignore it, it could lead to extensive—and expensive—issues down the road. We’re going to help you figure 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 determine where the noise is coming from, that’s alright. An expert can help verify where this noise is occurring.
  • Crackling – Crackling could result from debris in the unit or aging ductwork. Debris in the outdoor unit will create a noise outside your house. Mature ductwork can cause 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 due to a loose part.
  • Loud Noise – A clear noise from your external unit can indicate an issue with your compressor, damper, fan or air handler.
  • Humming – Humming can arise from 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 troubles 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 almost impossible to answer this question without examining your system. 

Usually, we recommend shutting off the unit off and calling 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 system. While AC repairs can be stressful and an unexpected cost, it’s smart to get problems corrected right away. Contacting 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 schedule online for a free, in-home consultation. 

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