E9 error appears and the machine reports a water system fault; water may leak into the drip tray or under the machine.

Safety first: Unplug the appliance. Do not operate a machine that is leaking internally due to risk of electric shock.

Leak inspection:

• External check: Remove and empty the external drip tray and check for cracks. Inspect the area under the machine for water trails.
• Open housing: Remove side or rear panels to access internal hoses and fittings. Look for wet areas, white limescale marks, or rust.
• Tighten connections: Gently tug on silicone hoses at the pump, thermoblock, and valves. Tighten or replace hose clamps that are loose. Replace any hose that is brittle or cracked.
• Check seals: Inspect O-rings at the thermoblock inlet/outlet and at quick-connect fittings. Replace hardened or flattened O-rings with food-grade, heat-resistant equivalents.

After repair: Run the machine with the covers off (only if you can do so safely) and observe for leaks. If E9 persists or water reaches the electronics, stop and contact a technician.