Hotend Fan error (and weird behaviour)
Hello there, first time poster here.
I got my i3 MK3S+ around april last year and it has been working perfectly since then.
Now today (after running fine 2 days ago) I suddenly got the "ERR: HOTEND FAN ERROR" message when trying to change filament or preheat.
The fan did not spin at all, so I dismounted it, cleaned it and checked all wiring to the RAMBo (unplugging and replugging it, checking the wiring inside the harness, etc.). After reassembly I noticed that the fan DOES shortly spin up during boot. I can also tell it to spin via the settings menu at any speed I want, it does not stop/slow down when moving the extruder along any axis.
Still, when I tell it to preheat or to unload filament, it gives me the same error as above. The weird part is that it does that wether the fan is running (by starting it manually) or not (because it does not start itself when starting the preheat).
Any experiences with that?
Thank you all in advance