Ascaso Internal Leak in Hydraulic Circuit

Water leaks from under the Ascaso coffee machine 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 silicone hose, Loose hose clamp, Leaking boiler gasket, Leaking 3-way valve or OPV fitting

How to Fix / Troubleshooting

Safety: Unplug the machine and let it cool. Water near live parts is dangerous.

  • External check: Remove the water tank and drip tray. Inspect for obvious cracks or overflowing.
  • Open the housing: Remove the top/side panels and look for water trails or mineral deposits to trace the leak source.
  • Tighten fittings: Gently tighten any loose compression or threaded fittings on the boiler, OPV, and valves.
  • Replace hoses: If silicone hoses are brittle, cracked, or swollen, cut back to fresh material or replace with food-grade silicone hose of the same diameter.
  • Boiler gasket: If water seeps around the boiler flange, replace the boiler gasket following Ascaso service procedures.
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Repair Difficulty

Medium 3/5

Required Part

Silicone Water Hoses / Boiler Gasket
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