F15
Miele
Overheating / Temperature Sensor Fault
Washer overheats or reports F15 during heating phase
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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
Shorted NTC temperature sensor, NTC wiring short to chassis, Stuck heater relay on control board, Scale buildup causing localized overheating
How to Fix / Troubleshooting
Safety first: Disconnect power immediately if overheating is suspected (very hot door, steam, or burning smell).
- Allow to cool: Let the machine cool completely before inspection.
- Check NTC harness: Access the heater/NTC area and inspect the sensor wiring for damage, chafing, or loose connectors.
- Descale: If the machine is heavily scaled (hard water area, no descaling), run a manufacturer-approved descaling cycle once the fault is cleared.
- If F15 recurs: The NTC sensor or control board heater relay may be defective. These parts should be tested and replaced by a professional.
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Repair Difficulty
Professional Required
5/5
Required Part
NTC Temperature Sensor
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