Sub-Zero freezer Error Code IC 30

Ice Maker Fault

What does IC 30 mean?

Ice maker system has detected a fault condition.

Common causes

Diagnostic & testing steps

  1. 1. Check water supply line for kinks or frozen sections
  2. 2. Verify water pressure at inlet - minimum 20 PSI
  3. 3. Test water inlet valve solenoid
  4. 4. Inspect ice maker mold for stuck ice
  5. 5. Test ice maker module for harvest cycle operation

Tools required

OEM parts & part numbers

Ice Maker Assembly, Water Inlet Valve

Part numbers: 4200520, 4200161

Safety warning

⚠️ Turn off water supply before servicing ice maker

Try DiagBuddy AI free — instant 30-second diagnostics for technicians.