Keeps popping up and switching the damn thing off basically. It was a new
immersion fitted in November and worked fine until a week or so ago at which
point I found no hot water and the button up. I reset it to get a bath but a
couple of days later it was up again and so on until now. I imagine all this
can be is a separate thermostat from the adjustable one with a single upper
limit temperature at which it deems things to be too hot. I've now tried
reducing the dial setting down a bit from the max (70c) I'd had it set at to
see if this helps.

Is there any adjustment inside these things or any likely reason why it
might have started playing up so soon?
--
Dave Baker