Countertop ice maker stops mid-cycle and displays E1 on the control panel

Safety first: Unplug the ice maker before removing any covers. Do not work on the unit while it is connected to power or water.

Step-by-step checks:

• Check water level: Remove the ice basket and open the reservoir lid. Make sure the water level is between the MIN and MAX marks. Refill with clean, potable water and restart the unit.
• Reset the unit: Turn the power OFF, unplug for 5 minutes, then plug back in and power ON. See if the E1 code clears.
• Inspect the water level sensor: With the unit unplugged, locate the water level sensor or probes in the reservoir (usually a small float or pair of metal probes). Clean any mineral deposits or slime with a soft cloth and a 1:1 vinegar-water solution, then rinse thoroughly.
• Check sensor wiring: Remove the rear or bottom cover (if accessible on your model). Trace the water level sensor wires to the control board. Ensure the connector is fully seated and not corroded or damaged.
• Test operation: Reassemble the covers, refill water, and run a test cycle. If E1 returns immediately with correct water level, the sensor or control board may be faulty.

When to call a technician: If cleaning and reseating the sensor wiring does not clear E1, the water level sensor assembly or main control board likely needs replacement and should be tested with a multimeter by a qualified technician.