@genioluiz7 said in Duet not connect in anyways - Clue: nozzle fan always on:
I want to ask you an info about the v1.05, is there a way to add a resistor for the heated chamber?
Do you mean a Duet 2 WiFi v1.05? It should be a drop in replacement for your current board. I'm not sure I understand what you mean by "add a resistor for the heated chamber". Do you mean a thermistor, ie temperature sensor? I think you still have one spare temperature input on your Duet. See https://docs.duet3d.com/en/User_manual/Connecting_hardware/Heaters_chamber
Ian