Technivorm Moccamaster Blocked Reservoir Inlet or Airlock

Water reservoir level does not decrease during brew cycle, but heater gets hot

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Possible Causes

Debris blocking reservoir outlet hole, Airlock in inlet tube, Scale buildup at reservoir base, Misaligned reservoir (on removable-tank models)

How to Fix / Troubleshooting

Safety: Unplug and allow the unit to cool before inspecting the reservoir area.

  • Inspect reservoir outlet: Look at the bottom of the water reservoir for the inlet hole. Clear any visible debris with a toothpick and rinse thoroughly.
  • Tap to release air: Fill the reservoir and gently tap the sides to dislodge any trapped air bubbles in the inlet area.
  • Descale: Run a descaling cycle to clear any mineral buildup at the reservoir outlet and in the inlet tube.
  • Check inlet tube (advanced): Remove the base and verify that the tube from the reservoir to the boiler is not kinked or blocked. Replace if necessary.
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Repair Difficulty

Easy 2/5

Required Part

Water Reservoir
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