The element and thermostat (instantaneous water heater) on this machine is situated in the plastic base beneath the tank.
It can be accessed for testing by removing the lid then the R/H side panel (after disconnecting from the power).
If the machine is not heating it could either be the element or the PCB.
If the Instantaneous water heater is faulty it’s not the easiest of things to replace.
Thankyou so many ch for your help. My husband has ordered a replacement thermistor (?) as decided to try the cheaper part first and has finally managed to do it (is currently putting back together as I type!).
It seemed as though water was heating during the cycle but dishes were stone cold at the end. Please tell me this is the right part I’ve got him to replace??!!
So many thanks again for your previous help.