Display shows E12; unit reports high temperature or fails to reach setpoint despite running.

Safety first: Unplug the ice maker. Do not attempt to open the sealed refrigeration system; this requires certified service.

Steps:

• 1. Clean condenser: Access the rear of the unit and use a soft brush and vacuum to remove dust and lint from the condenser coil. Ensure airflow is not blocked by cabinets or walls.
• 2. Verify condenser fan operation: After cleaning, restore power and observe if the condenser fan runs when the compressor is on. If not, see fan-related faults.
• 3. Check ambient conditions: Ensure the ice maker is not installed in an area exceeding the specified ambient temperature range.
• 4. Inspect temperature sensor: Some models use a dedicated overheat sensor or thermal fuse near the compressor or condenser. Test continuity and replace if open.

If E12 persists after cleaning and basic checks, a refrigeration issue (low refrigerant, restriction) may be present and must be handled by a qualified technician.