Ice maker stops mid-cycle and displays E04, ice partially formed on evaporator plate

Safety first: Disconnect power before accessing internal components near the evaporator plate.

• Locate evaporator thermistor: In many Ikea-branded ice makers, a small bead-type thermistor is clipped to the evaporator plate or embedded in a metal sleeve near the ice-forming surface. Remove the front cover or bin to access it.
• Inspect wiring: Check the thermistor wires for cuts, pinches, or corrosion at the connector. Reseat the connector on the main control board and at the sensor end.
• Test thermistor: With a multimeter set to resistance, measure the thermistor at room temperature. Typical values are 5–20 kΩ depending on design. If the reading is infinite (open) or near 0 Ω (shorted), replace the evaporator thermistor with the correct Ikea-compatible part.
• Check board input: If the thermistor tests good, the control board’s sensor input may be faulty. Inspect the board for burnt traces or corrosion. Replace the main control board if necessary.
• Reset and test: After replacing the thermistor, clear the error by unplugging the unit for 5 minutes, then restart and observe a full ice cycle.