Safety first: Unplug the washer before accessing internal components. Heating circuits can retain residual voltage.

1. Confirm symptom: Note if the washer fails to heat or ends cycles prematurely when hot water is selected.
2. Access NTC sensor: Remove the rear panel. The NTC temperature sensor is usually mounted in the heater bracket at the bottom of the tub or clipped into the outer tub wall.
3. Check connector: Ensure the NTC plug is fully seated and free of corrosion. Reseat the connector.
4. Test NTC (for technicians): With the washer unplugged, disconnect the NTC and measure its resistance at room temperature. Compare with Casarte specifications (commonly around 10–20 kΩ). If reading is near 0 Ω (short) or infinite (open), replace the sensor.
5. Inspect wiring: Trace the harness from the NTC to the main PCB for cuts or pinched sections. Repair or replace as needed.
6. Replace NTC if faulty: Remove the old sensor and install a new Casarte-compatible NTC, ensuring it is fully inserted and sealed.

Washer shows E12 and may stop heating or abort cycle, often related to temperature sensing

Possible Causes