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I analyzed the four main reasons for error 8 and showed in detail how to fix them. Along the way, I performed maintenance on the coffee machine. Now you can too. ;) This video fully applies to all Nivona series and models. The video turned out to be long, so I made a timeline. 00:00 Introduction 1:44 What to do if the brewing unit does not insert 6:55 The first and main reason for error 8 and how to deal with it 8:46 Regular cleaning of the drain valve compartment 13:29 If you are a beginner or have weak hands 15:55 Disassembling the coffee machine 22:30 Disassembling the gearbox 32:05 The second reason is that the gearbox shaft rotates with difficulty 33:32 We take out the drain valve 35:29 The third reason. Disassembling and assembling the brewing unit 48:03 Assembling the drain valve 49:34 Coffee grinder 56:24 The fourth possible reason. Checking the gear motor 57:25 Reaming the gear shaft seat 1:00:40 Assembling the gear and drain valve 1:15:54 Descaling Coffee machine repair +79951200920. Andrey.