Ok had car today and replaced the AC switch
remove the ash tray
remove two screws holding the trim panel, pull two knobs for temp and function off.
pull panel holding AC switches cig and power outlet out.
There are two clips at top right and top left, if these partly come out use trim remover to pop out.
unplug fan speed connector, main connector and cig and power point connector at back of assembly.
remove from car
Remove white module from trim cluster, 4 screws.
remove center button, has two clips at 3 and 9 o'clock
remove screw holding fan speed sw. Twist fan speed sw to release plastic tangs,
The fan speed knob was difficult to remove for me.
In the end I just pulled the switch assembly.
reassemble new switch in module, test in car, then re-install module in trim and replace, reverse of removal.