Interesting, thanks for the replies.
So The problem I have is that my dishwasher has stopped heating the water period.
Initially I suspected the pass-thru element, but this has tested as OK.
But what you are saying is this will only act to stop the heating once a given temperature has been reached?
So, if I’m understanding correctly, this will not be the cause of my problem.
Perhaps it’s the POT that needs to be replaced then….
…or perhaps I should just visit the skip followed by an electrical store!