Moccamaster
Overheat Protection Trip or Intermittent Thermal Cutoff
Brewing stops mid-cycle and does not resume
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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 on heating block, Failing thermal cutoff, Loose connection on thermostat, Faulty brew thermostat
How to Fix / Troubleshooting
Safety: Unplug the coffee maker and let it cool for at least 30 minutes before inspection.
- Check for overheating signs: Smell for burnt odors and inspect the base for discoloration. Heavy scale can cause localized overheating.
- Descale thoroughly: Run a full descaling cycle with a commercial descaler to improve heat transfer and reduce overheating.
- Inspect thermal devices: Remove the base cover. Locate the thermal cutoff and thermostats on the heating block. Check for loose connectors and signs of heat damage. Tighten or reseat connectors.
- Test continuity: With a multimeter, test the thermal cutoff and thermostat. If either is open when the unit is cool, replace the faulty component with the correct Moccamaster-rated part.
- Reassemble and test: After replacing parts, reassemble the base and run a water-only brew cycle to confirm continuous operation.
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Repair Difficulty
Hard
4/5
Required Part
Thermal Cutoff
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