So, on to the next issue. I've noticed that when I switch the engine off, the fans never continue to run.
I'm going to check this on the way home by getting it up to normal temperature on the motorway and then pulling into a layby and switching it off, rather than doing the A and B roads I would normally do on the way home before switching off.
I've tried searching but couldn't find anything, are there any connections or modules worth checking out? Has anyone come across this?