Can setup print fan

i wanted to add print fan to my printer connected it to D9 enabled it n config but when I set fan speed it also turns on extruder or if I turn on extruder it turns fan on used online config and edit manually nothing works have extruder on d10 fan on d9 and bed on d8


  • Sounds like a hardware issue that connects D8 and D9. Check your board for a short of these pins. Each fucntion can only set one pin so if 2 turn on it is 95% hardware.
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