Klarstein Internal Leak in Water Circuit

Klarstein coffee maker leaks water from the bottom during or after brewing.

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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

Cracked water tank outlet, Loose or split silicone hose, Leaking heater tube connection, Failed hose clamp

How to Fix / Troubleshooting

Safety first: Unplug the machine immediately and do not use it until the leak is resolved. Water and electricity are dangerous together.

External checks:

  • Remove and inspect the water tank for cracks, especially around the outlet valve.
  • Check that the tank is seated correctly and that the tank seal is intact.

Internal inspection (advanced):

  • Remove the bottom cover and look for signs of water trails, corrosion, or mineral deposits on hoses and around the heater.
  • Tighten or replace hose clamps on the heater inlet/outlet and pump connections.
  • Replace any silicone hose that is brittle, cracked, or swollen.

If the heater block itself is leaking (corroded or cracked), replace the entire heater assembly.

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Repair Difficulty

Hard 4/5

Required Part

Silicone Water Hoses / Heater Assembly
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