Hello.....the fan motor is located at the bottom of the windshield need to remove the wiper arms and the plastic cover to service it ,also the resister block is located right by it on driver's side.I would also check for good and clean connections at the fan motor once there are a lot of problems with that.
Good luck.Let me know . Accept my answer if i have helped.
I am very sorry, i am in USA ,have you look online,for oem Renault parts ?
Give it a try.