Moccamaster Open Circuit in Control Path

Brew cycle does not start when switch is turned on (no heating, but power outlet is good)

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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

Failed on/off switch contacts, Broken wire between switch and heating block, Faulty safety thermostat, Loose spade connector

How to Fix / Troubleshooting

Safety: Disconnect from mains power before opening the unit.

  • Check switch operation: Verify that the switch clicks positively. If it feels loose or mushy, suspect internal failure.
  • Access wiring: Remove the base cover to expose the wiring from the switch to the heating block and thermostats.
  • Inspect for breaks: Look for broken, burned, or disconnected wires. Repair or replace damaged wiring using high-temperature-rated wire and proper connectors.
  • Test switch and thermostats: Use a multimeter to check continuity through the switch and safety thermostat when the unit is cool and switched on. Replace any component that is open when it should be closed.
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Repair Difficulty

Medium 3/5

Required Part

On/Off Rocker Switch
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