Washer stops and displays F03; may not advance past fill or may drain immediately after filling.

Safety First: Unplug the washer before accessing internal components. Water may be present in the tub.

Step-by-step checks:

• Run a cold-only cycle: Select a cold wash and see if the error appears immediately. If it appears only on warm/hot, suspect the NTC or its circuit.
• Access the NTC: Remove the rear panel. The temperature sensor is usually mounted in the heater housing or directly in the outer tub near the heater terminals.
• Inspect wiring: Check the connector at the NTC for corrosion, loose pins, or broken wires. Reseat the connector firmly.
• Test the sensor: Disconnect the NTC and measure its resistance with a multimeter. At room temperature (~20–25°C / 68–77°F), most NTCs read around 10–15 kΩ (check your service manual for exact spec). Resistance should decrease smoothly as temperature increases.
• Check continuity to control: If the NTC tests good, check continuity of the harness from the NTC to the main control board.

When to replace: Replace the temperature sensor if its resistance is open, shorted, or far outside spec. If sensor and wiring are good, the main control board may be defective.