Thanks for the advice
It did fail once before and I established that the fuse had worked out which was surprisingly given the smooth and comfortable ride on my car
There is no obvious or visible damage to the windscreen although I have not examined the element closely
A replacement seems to be the best answer although they do seem very fragile even when fitted to Fords
The elements of heated rear windows used to be printed on the surface of the glass which although vulnerable could be repaired with an electrically conductive paint
It wasn’t always successful!
