Moccamaster
Premature Thermal Cutoff or Flow Blockage
Water remains in reservoir after brew cycle; machine shuts off early
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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
Overheating due to scale, Failing thermal cutoff opening too early, Blocked riser tube, Faulty brew thermostat
How to Fix / Troubleshooting
Safety: Unplug and let the unit cool before working on it.
- Descale first: Run a full descaling cycle to remove scale that can cause overheating and early cutoff.
- Check for blockages: Inspect and clean the outlet arm and riser tube for obstructions.
- Test thermal cutoff and thermostat: Remove the base cover and test continuity of the thermal cutoff and brew thermostat after the unit has cooled. Replace any component that opens prematurely or does not reset properly.
- Verify full cycle: After repairs, run a water-only cycle and confirm that the reservoir empties completely.
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Repair Difficulty
Hard
4/5
Required Part
Thermal Cutoff
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