Thank you for your help.Could that be a fuse to replace instead of a relay or the blower itself?

Hi everyone.I got a problem this week-end with my cooling fan. Now, the only level working his HI ! I do not get any blowing for the first 3 levels of the fan. Air condionning is working, but also at HI level. I tried to switch 2 relay in the fuses box, nothing changed.What's the difference between ...