Adler ice maker continues to run water even when the reservoir is full, sometimes overflowing.

Safety first: Unplug the unit and close the water supply valve to stop filling.

• Inspect float assembly: Access the Adler reservoir and verify the float moves freely without binding.
• Clean debris: Remove any scale or debris that could prevent the float from rising.
• Test level switch: Use a multimeter to check the switch contacts while moving the float; replace the Adler water level switch if it remains closed.
• Check control output: If the switch opens but the valve continues to energize, the main control board may be faulty and require replacement.