Hi there. Yes, it's located under the panel between bonnet and windscreen. Normally when this fails you'll get full power blowers at III, but nothing at II or I settings (as in both mine)...however, have heard of these completely failing so could still be that, but also check fuses, the fan motor connections and fan itself (check the blades rotate freely).
Bit of a bitch to get to (hence why I've not bothered), so good luck!