while being on the same note - my cars high speed cooling fan fuse was blown - new 30A fuse and we back in business (not that it ever needed it) But I have a problem now.

When the engine has been sitting for about 6 or 8 hrs, the high speed fan kicks on when I start the car - and switches off after about 5 minutes (its not an immediate cut out - its more like a on - off) situation for half a second and finally off

Disconnecting the temp sensor does nothing (the wiring harness condition is good btw) Am I looking at a bad CCU (because the heat/cool functions work nicely)