Moffat MSF 615 - oven/grill stopped working?

I left the grill on all day by mistake, and now neither the oven or grill are working. Can anyone suggest what needs fixing and how I can do this? The electricity supply seems be ok as the oven fan, oven light and front time display are all still working. So, I assume the problem is in the oven, not a blown fuse. Could it be that one of the thermostats that control the oven & grill is damaged, or is it something else? Thanks.