Ice maker stops and displays E1 on the control panel; unit may beep continuously and not start an ice-making cycle.

Safety first: Unplug the H.Koenig ice maker from the mains before opening any panels. Do not work on the unit while it is connected to power or water.

• 1. Power reset: Disconnect the ice maker for 10 minutes, then reconnect and try a new cycle. Sometimes E1 is a temporary sensor read error.
• 2. Check water supply: Ensure the external water reservoir (if applicable) is filled to the MAX line and that the suction tube is fully submerged. For plumbed models, verify the water tap is open and the inlet hose is not kinked.
• 3. Inspect the water level sensor: Remove the top or side cover (usually held by Phillips screws). Locate the water tank and the water level sensor (often a float sensor or pair of metal probes on the side of the tank). Make sure the float moves freely and is not stuck by scale or debris. Clean with warm water and a soft brush.
• 4. Clean sensor contacts: If the sensor uses metal probes, clean them with a cloth and white vinegar to remove limescale. Rinse thoroughly and dry.
• 5. Check wiring: Follow the sensor cable to the control PCB. Reseat the connector and check for corrosion or broken wires.
• 6. Test operation: Reassemble, plug in, refill water, and start a cycle. If E1 persists, the sensor or control board is likely defective and should be replaced.

Warning: If you are not comfortable working around electrical components, contact a qualified technician.