We have a DE6754 , pnc. 911915018/01 dishwasher with a “no heat ” fault . We have checked the element , level and safety switches and wiring which aLL test OK . We are thinking pcb , as this seems to be quite common on Zanussi dishwashers , but other posts on this model with no heat fault suggest that the machine would complete the cycle but without heating . Our machine will complete the cold prewash and stay on the main wash phase without heating . any help would be appreciated. ( There arew no fault codes displaying . )