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Isomac pressure problem

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  • Isomac pressure problem

    A strange problem began today on my Millenium. Shortly after I started to pull my second shot of the morning the boiler pressure gauge climbed from the normal 1.2bar to the full max. I stopped the pump, the pressure came back down. Restarted the pump and again the same behaviour. It also seemed like less flow than usual was coming through the portafilter. Where to look for the cause of this problem? Can't imagine how the pump can cause the boiler pressure to rise/fall. Might the 2-way fill solenoid be leaking? Appreciate any feedback or suggestions.

  • #2
    pm sent..........

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    • #3
      Sounds like your boiler inlet solenoid is leaking , will be pumping water into the boiler during extraction raising the pressure while starving the group.

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