Bought a Kimberley Swift S line Caravan Special just over a year ago having problems with Truma heating. The bottom 12V fuse keeps blowing. Had several people to look at it ; however may have got to bottom of it now by replacing fuse with time delay fuse. My local chap seems to think the wire shortens somewhere in the van causing a spike which makes the fuse blow. Have plugged the electric in several times and so far so good! Anybody else experienced problems with this. 🙁