E19 displayed, ice maker runs but makes hollow or brittle ice cubes

Safety first: Unplug the unit before accessing internal components.

Steps to improve cube quality:

• Check water level: Ensure the water reservoir fills to the correct level. Adjust or replace the water level sensor if the level is too low.
• Inspect evaporator sensor: Verify the evaporator thermistor is properly attached and not insulated by scale or ice. Clean the contact area.
• Clean harvest heater area: Mineral buildup can cause uneven heating. Clean the underside of the plate and heater contact points with descaler.
• Control reset: Perform a full power reset to clear any temporary calibration errors.

Note: Persistent hollow cubes after these steps may indicate a control board calibration fault that requires service tools to correct.