F13
Melitta
Steam Thermostat / NTC Fault
Display shows F13 and the machine reports a steam temperature or steam circuit error.
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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
Defective steam NTC sensor, Failed steam thermostat or thermal fuse, Loose sensor wiring, Limescale on steam thermoblock
How to Fix / Troubleshooting
Safety first: Unplug the machine and allow all steam components to cool completely.
Steps:
- Descale: Run a full descaling cycle to remove limescale from the steam thermoblock and valves.
- Check ventilation: Ensure the machine has space around it and is not overheating due to blocked vents.
Advanced:
- Open the housing and locate the steam thermoblock and its NTC sensor.
- Check the sensor connection and wiring for damage.
- Test the NTC and thermal fuse with a multimeter; replace any open or shorted components.
If components test good but F13 persists, the control board steam circuit may be faulty and require professional replacement.
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Repair Difficulty
Hard
4/5
Required Part
Steam Thermoblock NTC Sensor
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