In an earlier contribution to this discussion,
TRK's dad wrote:

Just a follow up to an old thread (Google groups won't let me post to
a thread more than one month old) - http://tinyurl.com/5ohxs

Thanks for all your help.

My father in law and I replaced our old hot water cylinder as the
tests you suggested confirmed that a dodgy coil was to blame. I was
even able to use the cylinder that he had taken out of his house to
have a solar hot water system installed so it cost next to nothing.

So far everything seems to be working satisfactorily.


I'm glad that we have a result - and that we rank amateurs (IMM please
note!) are able to provide some useful advice now and again.
--
Cheers,
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