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problem was|is with the hot tap on th burner would go out withwin seconds and not come on again no matter how long left running trv on all rads excepting bathroom.My recollection said one had to be permenantely on as a safety overide? At the moment the boiler seems to be behaving itself!.The...

thank you, when central heating on the boiler is firing ok.open up any hot water tap and the flame shuts off.Boiler installed March 2007 no problems excepting aprox 6 months ago for a few days boiler did not come on a couple of times then seemed to remedy itself.no service history since...

Any help please ; as plumber who attended is so far baffled! boiler works ok on central heating but flame cuts out as soon as hot water is drawn.seal on diaphragm seemed ok but replaced just in case. heat exchanger cleaned through in case of any muck etc .no joy will come on occasionaly but...