After spending almost £2,000 getting my engine changed and finally sorted out the cooling fans refuse to stop when the car is switched off. They run at full speed even with the engine totally cold. The only way to stop them is to disconnect the battery. There is no 50amp fuse in Fuse 54 under the engine bay fuse cover! I've been told that I need to replace the whole fan units but surely the fans are ok since they are working - must be whatever controls them to come on? HELP!!