Display shows F6 and the machine does not pump water or stops with an error shortly after starting.
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.
Possible Causes
How to Fix / Troubleshooting
Safety first: Unplug the machine and allow it to cool.
User-level checks:
- Check water tank: Ensure the tank is fully seated, filled, and that the tank outlet valve moves freely. Clean the tank filter.
- Prime the system: Fill the tank, then start a hot water or rinse program. If the pump is noisy but no water flows, stop, remove the tank, and refill to remove air. Reinsert firmly and try again.
- Descale: Run a full descaling cycle to clear limescale from the pump, thermoblock, and valves.
Advanced checks:
- Open the machine and inspect the Ulka-style vibration pump and hoses for leaks, kinks, or disconnections.
- Check the pump coil for continuity with a multimeter.
- Inspect the overpressure valve and flow restrictors for blockages.
If the pump does not vibrate when commanded, replace the pump. If it runs but no water flows even after descaling, a blocked hydraulic circuit or faulty valve may need professional service.
Repair Difficulty
Required Part
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