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I still have a problem where heating works fine. However turn on tap for hot water and everything seems to run but no flame kicks in. This boiler has now had, new thermisters Temp probes) microswitches, PCB, a complete diverter repair kit installed so all diverter valves and membranes have been...

I am at my wits end..have a biasi 24s Combi, heating seems ok but no hot water, if heating is on and turn on the tap it goes out... Sometimes (not often) if you put on water whilst heating is running you get hot water, but it never works on demand. A bit short of the readies right now, so got...