E12 displayed, ice maker runs but ice is wet, slushy, or melts quickly in the bin

Safety first: Unplug the unit before inspecting electrical components.

Steps to improve ice storage:

• Check door gasket: Inspect the bin door gasket for tears, gaps, or deformation. Close the door on a sheet of paper; if it pulls out easily, the seal is weak. Replace the gasket if necessary.
• Inspect bin thermostat/thermistor: Locate the bin temperature sensor (thermostat or thermistor) usually mounted on the bin wall. Check for secure mounting and intact wiring.
• Test sensor: With a multimeter, measure resistance of the thermistor at room temperature and compare to De Dietrich specifications (from service manual). Replace if readings are out of range.
• Check circulation fan: Some models use a small fan to move cold air into the bin. Verify that this fan runs and is not obstructed by ice.

Note: If the bin remains warm despite proper sealing and sensor replacement, there may be an insulation defect or internal air leak that requires professional evaluation.