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Change in noice level after flushing the group

Posted: Wed Mar 12, 2014 8:32 am
by issa
I have run into a bit of a problem with my 2,5 year old Mini vivaldi, whenever i flush the group the machine will Be very loud every time the heating elements kicks in, And I get a bit of dripping into the driptray as well. But the boiler is quiet as it use to Be, under warm up, after I backflush and after I pull a shot, but not if I flush the group, the noice level rises so it Sounds like a loud boiler/scaled boiler.

I tried descaling it, but the water didn't change color, so the boiler shouldn't be scale to such a degree that this is the cause of the change in sound.

Do any of you know What is causing this, my personal opponion is, that it might Be the 3-way-valve/brew valve that is not closing entirely after flushing the group, but I'm not entirely sure.