Water Heater switch off, engine not run but hot water from the taps - how?

There is a situation when the element was down to earth and you was on reverse polarity ,with no rcd it can hot up water even when switched off but I don’t think so .
 
There is a situation when the element was down to earth and you was on reverse polarity ,with no rcd it can hot up water even when switched off but I don’t think so .

Now that makes sense.
On our Princess, the ice maker was wired with the neutral to live - I couldn't understand why it kept blowing the RCD when the ice make failed.
Maybe PEJ's heater is wired in a similar way.
Heating elements are notorious for shorting to ground when they fail.

I keep spare heating elements.
 
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