no hot water on 105e, wah wah wah :(

[tomk]

Hi again

I looked on the data plate and it just says combi 105e so I'm assuming it's not the 105e INSTANT.I should say we have our boiler set on all the time. constantly. Ollski, the round brass housing that you mention has a nipple of some sort on the very front, it looks like this is supposed to strike the microswitch, it has lots of limescale around it and is flush with the rest of the nipple, when i turn on the hot water tap the nipple does not move. when i turn on the hot water tap and press the micro switch in manually there is still no hot water, all this is done with boiler set HW &CH on, and "auto on" on the downstairs controller, we still have realy hot rads . If i set the downstairs controller to off, the boiler is dormant, when i press this micro switch in this state, it lights and makes "running water" noises, but still no hot water . I dare say that the diaphram that you mention has leaked because of the limescale,but would this cause the lack of hot water? does this diaphram divert the demand from CH to HW? lastly it looks like i would have to drain the system to replace tjhis part, could anyone spare me the time and run me through hoe to do this?

Any replies are very much appriciated,

king regards

Tomk

 

[Agile]

This seems to be addressed to Oilski so perhaps I should not be replying?

You seem to be describing the DIVERTER VALVE and in particular the flow switch operating shaft gland ( Although I suppose that a "nipple" is also a gland. )

This gland often leaks and the resulting limescale can cause it to seize up. Either its seized or the diverter valve has failed or even both!

Tony Glazier

 

[tomk]

ta tony, i'll have a look, could anyone tell me the procedure for draining the system pretty pretty please?