Rancilio
3-Way Solenoid Valve Not Sealing
Water leaking from group head even when not brewing; slow drip into drip tray.
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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
Worn or contaminated 3‑way solenoid valve seat, Debris lodged in solenoid plunger, Damaged plunger seal, Scale buildup preventing full closure
How to Fix / Troubleshooting
Safety: Turn off, unplug, and allow the machine to cool.
- Backflush first: Perform an intensive backflush with detergent to remove coffee oils and small debris from the 3‑way valve.
- Inspect valve: If dripping persists, remove the 3‑way solenoid valve from the group circuit. Disassemble the valve body and clean the plunger, spring, and seat with descaler.
- Check plunger seal: Examine the rubber or PTFE seal on the plunger for wear or deformation. Replace the plunger or entire valve if damaged.
- Reassemble and test: Reinstall the valve, ensuring correct orientation and tight fittings. Test for leaks after warm‑up.
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Repair Difficulty
Medium
3/5
Required Part
3-Way Brew Solenoid Valve
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