I was also caught up in this situation with my Peugeot 406, the radiator fan stopped working. As it turned out, many Peugeot have problems with the cooling fan. A used fan is not an option, because brother bought and drove only a year on a good second-hand one from disassembly.
Buy a new original fan is too expensive, so I began to look for an alternative. I came across the site electrorefite.com where guys make control boards (ECU) for our ‘smart’ fans. I ordered, they sent the same day. By the way, the control board (ECU) looks more decent than the original one. I will not describe the process of removing the fan, there is nothing complicated. Disassembly of the fan and replacement of the board is strictly according to the instructions from the site electrorefit.com.
After assembly everything works properly.