Hi guys
Bit of a delay in getting around to looking at the dishwasher again.
Found out that the heater connection was faulty on the neutral side. From the point where the electrical connector plugs onto the heater module and the heater conductor itself was open circuit. I couldn’t see where or why as the break in the connection is inside one of the plastic supports. No signs of melting or burning.
Dishwasher is working again, so thanks for your advice with the error code.