Question about Krups XP 4000 Espresso Machine

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Pump makes strange staccato sound at 1 second intervals. A little coffee dribbles out. Then it just shuts itself off. Seems to be a pressure problem?

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Check the grind on the coffee or the packing pressure used to tamp. If it flows great without coffee in the portafilter, then the problem is the grind or tamp. The grind might be too fine that the pump has to use so much pressure that the relief valve open and most of the water goes into the drain tray.

Posted on Jun 30, 2009

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1 Answer

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I have been having trouble with the coffee coming out (vvery slow flow) so I descaled the machine today. Now its worse - it is just dribbling out - doesn't seem to have enough water going through. Can you...


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2. You are getting a blockage in the brew head from coffee residue and oils.
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I have a Karcher K 3.86 M electric PW with a similar problem: water leaks from the pump near the outlet and the pressure surges on and off continuously at intervals of 1-2 seconds. The leak appears to be coming from a very thin crack in the plastic pump head in what I think is the "unloader" valve portion. I read elsewhere that if you leave water in these PW's and it freezes it will crack, causing leaks. I don't know how you can empty all the water out so I think we must store these PW's in areas that won't freeze in winter.

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