padremiguel Senior Member Joined: 13 Jan 2013 Posts: 1 Location: Tucson Expertise: I live coffee
Posted Sun Jan 13, 2013, 10:52am Subject: Re: Krups xp2070 sends water straight to catch basin
Your symptoms description and repair instructions are spot-on. My unit appears to have incorporated some improvements. First, no torx screws (just phillips). There are 7 screws beneath the bottom cover securing the sides. Most importantly, the double bypass valves have been improved. The retaining cap for the spring/plug have been redesigned. They are one piece.
I started with valve #2 (randomly). I could find nothing wrong. I can tell you that finding the spring and small metal rod after they fly onto berber carpet is a unique challenge. At this point, I resorted to magnification to examine the two valves. I could see no difference between the two. They both looked fine.
I finally saw that the spring and plug in valve one were installed backwards.This explained why my symptoms were intermittent for two months. I occasionally had "launch failures" trying to produce espresso. A few days ago, it refused to launch at all.
I bought my "manufacturer refurbished" unit at "Big Lots" for an insanely low price. Yes, these items are a gamble but I took the bet. My hunch is that when it was returned to Krups, it worked fine when they tested it. They had no reason to look further. I am sure they have a category for "user error."
Bottom line - even in the "improved" units, there remains a potential problem with the double bypass valves. Again, there is a simple fix. Remove the the unbroken retaining cap and turn the spring/pin around with the spring going in first and the pointed-end of the pin facing inwards.
dblais Senior Member Joined: 14 Dec 2014 Posts: 1 Location: Vancouver, Canada Expertise: I like coffee
Espresso: Krups XP2070
Posted Sun Dec 14, 2014, 2:46pm Subject: Re: Krups xp2070 sends water straight to catch basin
Just want to say thanks for your detailed description and repair instructions. I took my unit apart and while the bypass valves both appear to be okay in that the plastic piece on the end was not broken, I think that one of the bypass valves was stuck open. I put everything back together and it works fine.
One question I have is you indicated the spring goes in first and then the metal plug, and the the plastic cap with hole clips onto bypass assembly. When I dismantled the unit, both bypass valves had the metal plug installed first and then the spring and then the plastic cap. My understanding is if the pressure builds up in the bypass assembly it would push the metal plug overcoming the spring pressure and releasing the pressure into the stagger chamber.
I would think that if the components are installed the other way around it would not open properly under pressure to allow the water to go to the stagger chamber.
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