IceKing ice maker displays E4 and shuts down; compressor may not start or stops shortly after starting.

Safety first: Unplug the unit before cleaning coils or accessing internal components. Do not attempt to open the sealed refrigeration system yourself.

Step-by-step checks:

• 1. Check ventilation: Ensure the IceKing ice maker has proper clearance around the sides and back as specified in the manual. Poor airflow can cause overheating and E4 errors.
• 2. Clean condenser coils: Locate the condenser coil (usually at the back or bottom). Use a soft brush and vacuum to remove dust and lint. Do not bend the fins.
• 3. Inspect condenser fan: With the rear panel removed, locate the condenser fan motor. Spin the fan blade by hand (with power unplugged) to ensure it moves freely. Check for obstructions.
• 4. Test fan operation: Reassemble enough to safely power the unit. Plug in and start a cycle. Observe whether the condenser fan runs whenever the compressor is running. If the compressor runs but the fan does not, the fan motor or its wiring is likely faulty.
• 5. Feel for heat: Carefully feel near the condenser coil area (without touching live parts) to see if it becomes excessively hot. Overheating may trigger the high-temperature sensor.
• 6. Sensor and refrigerant issues: If coils are clean and the fan runs but E4 persists, the issue may be a faulty temperature/pressure sensor or a sealed-system problem (low refrigerant, restriction, or compressor issue). These require specialized tools.

When to call a technician: Any suspected refrigerant or sealed-system issue, or replacement of a high-pressure sensor, should be handled by a certified refrigeration technician.