Contact Ferroli support and they talk you through the process. It requires a sequence of key presses on your panel and it is fixed in minutes.
We are not talking about the standard reset this is black magic stuff that Ferroli do not publish.
Biggest problem with Ferroli is that most engineers don't work with them so would rather give you a £300 bill than admit they have no idea what is wrong.
I know as my £300 bill for my He Plus 31C disappeared as soon as the second engineer who came out was smart enough just to pick up the phone and ask the question.
RocksteadyEd
November 2019