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Hissing and gurgling sounds in Window AC

  • Others
  • Others
  • Operation
  • Window Air Conditioners
  • Last Updated 12/06/2012

Why does the unit make hissing and gurgling sounds?


The refrigerant flowing inside the air conditioner causes a soft hissing or gurgling sound when the air conditioner is turned on or off.

These are normal operational noises. 

During the first 2-3 minutes of operation, the air conditioner may be louder due to the compressor starting up.

Best regards

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