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Sub-Zero Gurgling or Hissing Noise


  • Why is there a gurgling noise coming from the refrigerator, freezer, or wine storage unit?
  • Why is there a hissing noise coming from the Sub-Zero when the door is closed?
  • A service technician suggested increasing the unit's temperature to resolve the noise
  • Refrigerant noise, freon hissing, Designer (formerly Integrated) noise
  • Drain gurgle


A gurgling or hissing noise from a Sub-Zero can be attributed to a number of things, such as a partially plugged drain tube, water drainage during the defrost cycle, or evaporator operation. Such noises are usually considered normal operation.


If the issue persists, no further troubleshooting advice is available. Contact Factory Certified Service to schedule an appointment for repair.


Need further assistance? Contact Customer Care at 800.222.7820 or provide your information below and request a Customer Care representative contact you.

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