He came out not call out fee , advised the fault and told me to order the board and he would fit it for £30 . But after looking at it closley didnt look like rocket science to take out the old one and replace the new one so I ended up doing it meself . If he had said it was the Diverter Valve I would have gladley let him do the job ...I used to build computers so PCB's to me are straight forward .