E8 appears; water tank is full but machine reports water shortage and will not start ice production.

Safety: Unplug the unit before removing the water tank or internal covers.

Steps:

• Verify water level: Ensure the reservoir is filled to the indicated MAX line. Reinsert the tank fully so that any magnetic or mechanical level sensor aligns correctly.
• Clean the float: If your Caso model uses a float in the reservoir, remove it and clean off mineral deposits or slime that may cause sticking. Soak in a vinegar solution if scale is heavy, then rinse thoroughly.
• Check the level sensor: Locate the water level sensor or float switch (often a reed switch or micro-switch). Ensure it moves freely and is not obstructed.
• Inspect wiring: Follow the sensor wires to the control board. Look for breaks, pinched sections, or loose connectors.
• Test the switch: With a multimeter, check continuity of the float switch while moving it between low and high positions. It should open and close reliably.
• Replace faulty parts: If the float switch does not change state or is physically damaged, replace the water level sensor / float switch assembly.
• Control board check: If the sensor tests good but E8 persists, the level-sensing circuit on the main control PCB may be defective and require replacement.