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Sub-Zero Blue or Green Ice Cubes or White Flecks in Ice

Topics:

  • Why are ice cubes green?
  • Why are ice cubes blue?
  • What to do when ice maker makes blue or green ice cubes?
  • Why are there white flecks in the ice cubes?
  • Why are ice cubes cloudy?

Cause:

  • Copper corrosion in the water line supplying the refrigerator causes blue or green ice
  • Cloudy ice is the result of mineral deposits in the water that appears as the ice dries out
  • Calcium deposits in water cause white flecks in ice cubes, especially as it melts
    • When water freezes and thaws, the minerals in it concentrate and the thaw cycle contributes to this
    • Ice shrinks as it evaporates, leaving this concentrated mineral "residue"

Troubleshooting:

  1. Verify no service messages, icons, or error codes are shown.
  2. If installed, verify the in-line water filter is not expired. See also:
  3. Verify a Sub-Zero water filter is being used. Refer to Non-Sub-Zero Water Filters for further information
  4. Adding an in-line water filter (available at most home improvement stores) may reduce or eliminate discoloration.
    • Refer to the product Installation Guide for water pressure specifications.
    • Calcium deposits may just be in the water line to the unit. Using the filter in the unit (Classic (BI) and Designer (IT, IC)) or adding a filter to the water line can help reduce calcium deposits.
    • Calcium deposits are not visible in liquid water. To test home water supply, use water from a different tap to make a batch of ice in an ice tray.
  5. Discontinue use of ice.
  6. Consult with a local plumber.
    • Plumbers may clear water lines and replace corroded plumbing fixtures for blue/green ice.
    • Plumbers may suggest the best kind of filter for white sediment in water.
  7. For any other color ice cubes, contact a plumber, as this is a water or water line issue.
  8. If these steps do not resolve the issue, no further troubleshooting advice is available. Contact Factory Certified Service to schedule an appointment for repair.

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