Have a issue with the DHW control on Combi 80 boiler. When we turn on the hot tap the plunger which operates the micro switch deos not seem to move much, have changed the diaphram inside the housing this was not new but an old unit that was given to us by a friend and greased the little plastic stick which connects to the metal head, this seems to move freely enough. The old diaphram was really knackered and in bits. The tap has to be on nearly full before the boiler operates. There has been no improvement or difference in operation since changing the diaphram. Central heating works fine.
Any ideas very welcome.
Any ideas very welcome.