E3 appears on the display; ice production stops and the unit may beep repeatedly.

Safety first: Unplug the ice maker and drain any water before disassembling the reservoir area.

Steps to resolve E3:

• 1. Check water level: Ensure the reservoir is filled to the correct level. Too low or too high can confuse the sensor. Use clean, potable water.
• 2. Inspect the float: Locate the plastic float inside the water reservoir (often a small cylinder or disc that moves up and down). Make sure it moves freely and is not stuck by scale or debris.
• 3. Clean mineral deposits: If you see white or brown scale on the float or guide tube, remove the float and soak it in a 1:1 mixture of white vinegar and warm water for 15–20 minutes. Wipe the guide clean and rinse thoroughly.
• 4. Check the float switch or sensor: Under the reservoir, find the float switch or electronic water level sensor. Inspect for cracks, water intrusion, or loose connectors. Reseat the plug on the main PCB.
• 5. Test the switch (if mechanical): With a multimeter, verify that the float switch changes state (open/closed) as you move the float. Replace the switch if it does not respond.
• 6. Replace faulty components: Install a new HOMCOM water level float switch or sensor if the original is defective. Ensure the float is correctly oriented and moves smoothly.
• 7. Refill and test: Reassemble, refill the reservoir to the indicated line, plug in the unit, and start a cycle to confirm E3 is cleared.

Warning: Do not bypass the water level sensor; doing so can cause overflow and electrical hazards.