machine has overfilled and water in the tray in the bottom of the machine. level switch activated. empty tray and replace flowmeter device around £15 plus delivery from www.partmaster.co.uk. I had the same problem. Flow meter measures amount of water added to machine, id faulty will overfill and set off overfill sensor and give E4 fault on display.
Hope this helps
Maurice
July 2008
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