Ice Makers Diagnostics
Sub-Zero Ice Makers
Sub-Zero Ice Makers
Error Codes
Meanings, severity levels, safe checks you can perform, and when to call a technician.
Enter the code shown on your ice makers display
Is it safe to keep using it?
Depends on code severity. Low/Medium codes often allow continued use, High severity requires immediate stop.
Can error codes be reset?
Some codes clear after power cycle. Persistent codes indicate underlying issues needing repair.
When should I stop using it?
Stop immediately for water leak codes, burning smell, or any High severity error.
Most Common Codes
All Codes
Error Code Directory
Click any code for detailed troubleshooting steps
Low
Medium
High
Code
Meaning
Severity
Common Symptom
CLEANING-DUE
Periodic Cleaning Overdue
Low
Ice cubes from the bin have a slight musty, stale, or chemical smell and impart an off-flavour to drinks — the classic indicator of microbial or mineral buildup in the water circuit.
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EC30
Water Valve Solenoid Over-Active
High
The Sub-Zero ice maker displays EC30 and halts the ice-making cycle because the control has detected an abnormal water-valve condition.
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HARV-STUCK
Harvest Cycle Incomplete — Ice Frozen to Evaporator
Medium
Opening the ice maker reveals a solid mass of ice adhered to the evaporator surface that has not been released into the bin during the harvest cycle.
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NO-ICE
No Ice Produced
High
The ice storage bin remains empty after a full day of operation — no ice cubes have been produced even though the unit is powered on and displaying no error codes.
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SLOW-ICE
Ice Production Below Expected Rate
Medium
The bin has some ice after 24 hours but is clearly not reaching its normal capacity, and the unit cannot keep up with household demand.
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WATER-LEAK
Water Pooling Under or Behind Unit
High
A visible puddle of water appears on the kitchen floor near the ice maker, or the toe-kick area shows signs of water damage.
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