For the last few weeks I've been having intermittent internal fan failure (with AC either switched on or off) which I'm guessing could be imminent failure of the fan unit itself or just a loose wiring connection. Can anyone advise the best way to investigate this other than paying the garage to look at it? Funds are a bit tight at the moment with a new baby on the way and it gets a bit sweaty in the leather seats this time of year with no AC! When it works it works fine, otherwise there is no blow whatsoever.