Immersion Heater/Economy 7 (replaced but still trips)

[JohnD]

various questions

how about some answers?

BTW I have looked at your picture of an uninstalled cylinder, and it doesn't help at all.

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A picture of the wiring at each end in your actual house might help, though.

I'm not sure exactly - all I know (and can remember being told) is that when power goes to the heater/element it trips/blows the switch which the wires from the heater/cylinder are connected to (looks like a basic power switch - we've changed the 13A fuse). Nothing changes on the main circuit/switch board and no water is getting heated.

If nothing trips in the consumer unit (and this was not the impression I had before) then the fault should be downstream of the switch you mention. If it has a 13A fuse in it then it sounds like what we call an FCU. If it blows the fuse the moment you turn it on (you may see the red neon flash briefly) then it sounds to me like a dead short, and I would be very suspicious that the flex between the switch and the immersion heater head had been incorrectly connected, or was damaged e,g, through old age and heat. I don't know if the electrician carried out insulation and resistance tests, or, if not, why not. that's why I wondered what memberships he claimed, how long he took, and what he charged.

 

[Taylortwocities]

Yes nice library picture of a blue indirect water tank. We know what a tank looks like

We need a picture of YOUR tank with a closeup of the immersion, switch and associated wiring!

 

[Stanling]

Ok - have managed to get my flatmate to take some pictures - click on the link

My Albums Link: //www.diynot.com/network/Stanling/albums/

Any ideas now? Thank you!