Moccamaster Electrical Short Circuit

Unit trips household circuit breaker or blows fuse when turned on

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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

Shorted heating element, Pinched or damaged internal wiring, Water leak onto electrical components, Shorted on/off switch

How to Fix / Troubleshooting

Safety: Do not repeatedly reset the breaker. Unplug the coffee maker immediately. Water and electricity are a serious hazard.

  • Inspect for moisture: Check for signs of water leakage around the base and inside the housing. Resolve any leaks before further testing.
  • Open the base: Remove the base cover and visually inspect all wiring for melted insulation, burn marks, or pinched wires.
  • Test heating element: Disconnect the heating element and measure resistance to chassis ground. Any continuity to ground indicates a shorted element; replace the heating block assembly.
  • Check switch and connections: Inspect the on/off switch and connectors for signs of arcing or melting. Replace any damaged components.
  • Reassemble and test: After repairs, test the unit on a protected circuit and monitor for normal operation.
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Repair Difficulty

Professional Required 5/5

Required Part

Heating Element Assembly
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