My Saunier Duval combi boiler (sorry no model no.) has suddenly stopped working. Before, a green light would come on when the boiler was switched on - now the green light flashes constantly but there is no hot water. Is this likely to be an electrical fault or a pipe / valve issue? Sorry I can't give more details but I came back from holiday and found it had stopped working. Any comments please - would like educated guesses as to the cause. Boiler is not that old and can't afford a new one! Thanks.

Kate, Lewisham, November 2007

check the pressure make sure its above 0.5 bar on the gauge and not above 1.5 ish.. top pressure up by opening filler loop underneath base of boiler. in the manual it also says if flashing slowly it could be that it is swithced to the wrong summer/ winter setting, its on the "0" setting rather than the summ/win setting.
if flashing rapidly it means you need to get an engineer out.
kind regards john

john, December 2007