Washer stops during wash or rinse; display shows E05 indicating a temperature sensor or heating error (on heated models).

Safety first: Disconnect power and allow the machine to cool before working near the heater or tub.

• Check wiring: Access the rear or bottom of the washer to locate the heater and temperature sensor (NTC) mounted in the tub. Inspect wiring connectors for looseness or corrosion and reseat them.
• Test NTC sensor: Remove the sensor and measure its resistance at room temperature. Compare to UniMac specifications; resistance should change smoothly with temperature. Replace the sensor if readings are out of range or intermittent.
• Test heater element: With wires removed, measure resistance across the heater terminals. An open circuit indicates a failed element. Also check for continuity between each terminal and ground; any reading indicates a shorted heater that must be replaced.
• Control relay: If the sensor and heater test good, the control board's heater relay may be defective. Visual inspection may show burned contacts, but replacement of the control assembly is typically required.