Ice maker overfills with water; water spills into bin or cabinet

Safety: Unplug the unit and shut off the water supply immediately to prevent flooding.

• Inspect float mechanism: Locate the water reservoir float or float switch. Check for scale, slime, or debris that may be preventing free movement.
• Clean float: Remove the float and clean with warm water and mild detergent or ice machine cleaner. Ensure it moves freely up and down.
• Test float switch: Use a multimeter to check continuity of the float switch while manually moving it. Replace if it does not open/close properly.
• Check wiring and control: Inspect the harness from the float/sensor to the control board for shorts or damage. If the float is working but the valve continues to fill, the control board water fill relay may be stuck closed.
• Replace faulty parts: Replace the KitchenAid float switch or water level sensor first. If overfill persists, replace the main control board.