Thanks Joe, i had a feeling that might be the case but thought i would ask. Along similar lines, the module that actually does the hard work for the AC of switching the heater valve, the one above the glovebox (can't think of the name just now), i'm guessing that's not interchangeable between early and late cars either?
No prizes for guessing, the AC only blows hot or hotter, depending on temperature selected! The dealer fitted a new heater control valve but that hasn't fixed it. On a very steep learning curve at the moment! 😉 😄