Machine displays E10 and water does not flow correctly
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 before accessing internal components.
User-level steps:
- Check water tank and filter: Ensure the tank is full, seated correctly, and that any water filter (Intenza+ or similar) is not clogged. Try removing the filter and testing again.
- Bleed air: Run hot water through the steam/hot water wand for 30–60 seconds to purge air.
- Descale: Run a full descaling cycle to clear limescale from the pump and OPV.
Internal checks (advanced):
- Access the pump and OPV assembly.
- Check pump operation: During a brew command (with caution and proper insulation), listen for the pump. A loud buzzing with no water flow suggests blockage; silence suggests pump failure.
- Inspect and clean the OPV and connected hoses for blockages.
If the pump does not run or has very weak output, replace the ULKA pump. If E10 persists with a new pump, the control board or pressure control components may require professional diagnosis.
Repair Difficulty
Required Part
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