We have a Siemens washing machine with a fault we have never come across. On higher temperature washes (40* 60* 90*) it will fill and wash and heat then the display goes blank, door wont open. After a few minutes turning the selector knob to 0 then onto a program the display lights up. On a 30* wash it works Okay. The heating element had a small earth fault, changed the element same fault. we have checked the mains supply, plug, socket, suppressor they are Okay. Anyone with any ideas? Anyone got a manual? or diagnostics?