boiler lock out froli?

i note that the problem on your combi is the same as what has just happened to one of ours we have changed the pcb ingniter board and no change so im now thinking gas valve? the gas valve looks like a electrical solinoid that needs a signal to open it is this sent from the flame probe opposite the igniter probe in the combustion chamber,did you sort yours my tel no 07891254730 hope u can help as it is cold! steve. model is ferroli modena 80