Hi
I have got a integrated Tecnik / Bosch dishwasher SE6TIE2 GB/74. The heater unit packed up and the water was not heating at all. I replaced the heater;
http://www.espares.co.uk/product/es1065955/dishwasher-instananeous-water-heating-element?SearchTerm=483058.
The water now heats up...