Hi Gordon, it will be the pcb that is faulty.4 mins is the time the programme takes to get to the heat cycle and it then stops as the memory has frozen.The part number is 816290672 and it is £115 plus vat and postage.It is an easy repair,take off the decor door and then the 8 torx screws for the control panel.Take off the wiring plugs 1 by 1 and refit.All the best
Foxy
August 2008