IceKing ice maker shows E3 and stops mid-cycle; ice production is intermittent or halted.

Safety first: Unplug the ice maker before working inside the bin or near electrical components.

Step-by-step checks:

• 1. Empty the ice bin: Remove all ice from the storage bin so you can see the sensor area clearly.
• 2. Locate the bin sensor: On many IceKing models, the ice bin full sensor is an infrared emitter/receiver pair on opposite sides of the bin opening, or a mechanical level switch mounted near the bin.
• 3. Clean sensor lenses: If your model uses optical sensors, wipe both lenses with a soft, damp cloth to remove frost, mineral deposits, or dust. Dry thoroughly.
• 4. Check for obstructions: Make sure no plastic liners, bin walls, or misplaced parts are blocking the sensor beam or movement of a mechanical float/arm.
• 5. Inspect wiring: Follow the sensor harness back to the main control PCB. Ensure the connector is fully seated and wires are not pinched or broken.
• 6. Reset the unit: Plug the ice maker back in and power it on. Clear the error if your model has a reset button or power-cycle the unit. Observe if E3 returns when the bin is empty.
• 7. Replace sensor if needed: If the error persists with a clear, empty bin and good wiring, replace the ice bin full sensor assembly or level switch according to the service manual.

When to call a technician: If you are unsure which sensor your model uses or need to access internal wiring behind panels, a technician can diagnose and replace the correct sensor safely.