Tristar Restricted Flow / Partial Blockage

Coffee maker drips coffee slowly or takes much longer than normal to brew a pot.

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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

Scale buildup in thermoblock, Clogged filter basket outlet, Partially blocked silicone hoses, Weak vibration pump

How to Fix / Troubleshooting

Safety first: Unplug and let the unit cool before descaling.

  • Descale thoroughly: Run at least one full tank of descaling solution through the Tristar coffee maker, then two tanks of clean water. Repeat if flow is still slow.
  • Clean filter components: Wash the filter basket, permanent filter (if used), and brew head area to remove coffee oils and fines.
  • Check for kinks (advanced): Remove the bottom cover and inspect hoses for kinks or partial collapse. Replace any hardened hoses.

Note: If descaling does not improve flow, the pump may be weakening and require replacement.

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Repair Difficulty

Medium 3/5

Required Part

Thermoblock and Vibration Pump
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