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It does not say, what causes high level of water in the steam boiler. ... High pH in your water supply can cause foaming and water feeder troubles; .... I have a clearenough understanding of the condition of your water feed valve .... My system has separate McDonnell and Miller automatic water feeder and Low water cut off.
There is an economizer valve on the machine that needs to be adjusted. I will assume it was pumping hot water, this is not a new installed machine, then the machine has scale buildup that is preventing the hot water from leaving the boiler through the tubes to the solenoid, only the mixed cold water is being dispensed. If this is a new installed machine, adjust the economizer on the boiler, remove the left panel for access. Big nut on the boiler you will see where it connects to the solenoid.
It was set to that temp by the factory, check the thermostats on the boiler of the machine, those are the set temps. If your machine has a pressure stat you might be able to adjust it to a little higher, never go past 198.
Try this press the button for ground coffee then when it lights up press the coffee brew button, if water flows normally then the grind on the grinder needs to be adjusted coarser, if no water then the screen on the brew unit is blocked.
Check the top of the group head there is a large bolt, within that is the metering jet and filter, that might be the cause of the blockage(either the jet is clogged or the filter is clogged). As for the full temp on the boiler what reading do you get on the gauge boiler side, it needs to be at about 1.2 bars.
If you cannot get hot water from machine(brew unit or steam valve), then there is something wrong with boiler elements. If water won't flow thru coffee(pump is not vibrating) and you've tried adjusting the grind to a coarser setting, then you will have to replace the pump($50). However, since no water is going thru machine and it does not heat up then the problem might be the board or the inline fuse on the machine.
hey. you have calcium build up on the wands that go in your boiler so they can't messure the temp properly so it keeps heating.buy a decalcifier from any coffee site online or coffee machine sales and repaires place.