Hi guys, my aircon has not worked for a few months now, on further investigation last week I noticed neither of the two radiator fans worked at all, I unplugged the fan control unit plugs and plugged in another control unit but still not working....... what next? cannot see any broken wires.

Check all the fuses in the fusebox on top of your battery. One of the strip fuses, and one of the 'normal' ones are related to the radiator fan system.