Pump and valves

The pump, anti-drip valve and flow meter

De'Longhi gives owners no repair jobs. The manual: "If the appliance is faulty, do not attempt to repair. Turn it off, unplug from the mains socket and contact Customer Services." The US manual adds that removing the exterior, repairing or modifying the machine voids the warranty (1 year in the US plus 1 with registration; 2 years in the UK and EU). Treat this as Customer Services work: the methods shown are owners', named where they appear.

Coffee Grump (technician) says the pump is about three quarters of his Dedica repairs. Signs:

• Water pushed back into the tank while brewing: the anti-drip (over-pressure) valve on the pump outlet (Coffee Grump).
• Stops brewing: "a big chance it is a faulty Anti Drip Valve" (Igor Kadulenkov, owner).
• Buzzes, nothing comes out: after the easy checks in no coffee, a worn pump.

Moss (EC685M): lever the pump out of its clip, remove its screws and pull it out. Nothing on the pump or its valve is adjustable.

De'Longhi Dedica EC685: every job