my baxi 105e has a small leak. it appears to be coming from a small hole in the centre of a nut (?). this is to the left of the lower internals. it sits centrally in front of a circular thing (about 100mil diameter) and behind a small switch type thing with two green wires going into it. whats happening? many thanks in advance.

griff, July 2006

buy the diaphram kit.in most cases it is the nut that ust needs replacing.remember to isolate watwer feed to boiler and open the taps

alan, July 2006

Diapram and captured o ring, more than likey be the dhw diapram.

timmo, July 2006