I had a ferroli boiler OPTIMAX HE 25 S installed 3 years ago. Since I replace the fan, that took me 5 months to get it, change the fan the pcb went, change the pcb now the pcb say fault to the water sensor. Where that is going to stop?? So far the bill is much higher than the price of the bloody ferroli boiler. Ferroli got a very lousy approche. I don't know what to do, I have been without boiler for the past 9 month know.Yes I know the best way will be to change for an other one better. What the ****....