Thanks for the reply Dave - not the most popular post for replies this one it seems.
No separate isolating switch, safety lock out or fuse problem I can see.
I might be wrong with the Economy seven reference - I mean cheaper overnight heating - there's nothing saying economy seven on the...
I've moved into a flat with this hot water cylinder. While the boost function works, the overnight, economy seven setting doesn't. I think there are two immersion heaters - Cotherm? Is the most likely reason that one of them has packed up? If so, do they cost much to replace and can my local...