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Thread: Isomac pressure problem

  1. #1
    Junior Member
    Join Date
    Jul 2012
    Montreal, Canada

    Question Isomac pressure problem

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    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. #2
    Senior Member chokkidog's Avatar
    Join Date
    Apr 2008
    Victoria, Australia
    pm sent..........

  3. #3
    Join Date
    Feb 2010
    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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