It sounds to me as if you have two immersion elements.
One at the bottom for Economy 7 and one neat the top for daytime boost.
The one at the bottom has failed or tripped ( little tiny manual reset inside the cover ) and you have been operating on the boost element at daytime charge rates.
Dont open anything unless competent and power is turned off.
Tony
One at the bottom for Economy 7 and one neat the top for daytime boost.
The one at the bottom has failed or tripped ( little tiny manual reset inside the cover ) and you have been operating on the boost element at daytime charge rates.
Dont open anything unless competent and power is turned off.
Tony