Ok so ive had the dash off and a good look. A 7.5a fuse burnt out on the second setting.
Can't see anything on the circuit board. But it does have quite a few active components and some relays... so for example the fan switch definitely powers a relay or two... tbe gauge of the wire tells me that. Hurrumph. I still have a warranty so back to Krazy Horse we go. And if i can't get it fixed within a week we'll be risking France with if as is....