I have a Baxi Combi 105 E, had problems with it ever since i have had it 7 years ago, for the past year not had any hot water from the sink taps but have managed to get it from the bath and showers, a couple of months ago had the pressure vessel and diaphragm replaced to try and solve the problem but this has only made it worse, and now only get hot water from the bath tap if I am lucky, today was not a lucky day please help, plumber coming round on Monday to replace diaphragm again, but admits he is stuck!