E9 error appears and the ice maker stops; ice may be thin or irregular.

Safety first: Disconnect power and turn off water supply before working inside the water reservoir.

Steps to correct:

• Access water reservoir: Remove the ice bin and interior covers to expose the water tank or trough.
• Inspect float or sensor: Locate the float assembly or electronic water level sensor. Check for mineral deposits, slime, or debris that could prevent free movement or accurate sensing.
• Clean components: Remove the float and clean with warm water and mild vinegar solution to dissolve scale. Wipe electronic sensors gently with a soft cloth.
• Check wiring: Ensure the float switch or sensor harness is intact and firmly connected to the control board.
• Test switch: For mechanical floats, use a multimeter to test continuity while moving the float up and down. Replace the switch if readings do not change.
• Reassemble and test: Reinstall the cleaned or new parts, restore water and power, and run a cycle to confirm normal water fill and that E9 clears.

When to call a technician: If the sensor tests good but the control still reports E9, a board-level fault may exist and should be evaluated by a professional.