The steam function works and there is The standard vibrating when I turn it to pump Espresso but nothing comes out.
SOURCE: I have a 6 moth old Delonghi EC155 espresso maker.
The problem is that the steam thermostat is not working right and leave the boiler overheat enough to start burning the boiler pastic seal and also the overheated steam blow out some boiler dirt gather by previus use which was liying in the boiler and it was gather from water, soil is brown color.
So now if you are lucky first dont switch it on again since it might be on the starting of the problem and you can avoid it by just replacing the steam themostat. Howevr you must work it then without the top cover with extra safety of course in order to visual check if you have any other damage from the overheating like gasket burned out and or water leaking or else.
Good luck
SOURCE: Steam knob won't turn on brand new DeLonghi EC155
Try turning it COUNTER-CLOCKWISE. This is was got it "unstuck" for me.
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