E12
SMEG NTC Temperature Sensor Fault

Washer shows E12 and may stop during heating; often associated with temperature sensing issues.

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Open or shorted NTC sensor, Loose NTC connector, Damaged wiring between NTC and PCB, Control board analog input fault

How to Fix / Troubleshooting

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

  • Access NTC sensor: Remove the rear panel. The NTC is usually clipped into the heater bracket or inserted into the tub wall near the heater.
  • Check connection: Ensure the NTC plug is fully seated and free of corrosion or moisture.
  • Test NTC (qualified persons): Disconnect the sensor and measure its resistance at room temperature. Compare with SMEG service specifications. Replace if readings are out of range or unstable.

If the NTC tests correctly but E12 persists, the main control board may not be reading the sensor correctly and may require replacement by a technician.

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Repair Difficulty

Medium 3/5

Required Part

NTC Temperature Sensor
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