De'Longhi Internal Leak in Hydraulic Circuit

Water leaks under the 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 on pump or thermoblock, Leaking O-ring on water inlet, Cracked water tank or tank seat

How to Fix / Troubleshooting

Safety first: Turn OFF, unplug the machine, and do not use it until the leak is resolved. Water and electricity are a serious hazard.

  • Check external parts: Remove and inspect the water tank and drip tray for cracks or overfilling.
  • Inspect tank seat: Look for water pooling around the tank connection area.
  • Dry and test: Dry the exterior, place paper towels under the machine, and run a short rinse cycle while observing for drips.
  • If leak is internal: Do not open the machine unless qualified. Contact a service center to replace hoses, O-rings, or fittings.
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Repair Difficulty

Professional Required 5/5

Required Part

Silicone Water Hoses
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