I built a marlin 2.0 bugfix firmware to use on my 3d printer, which has a 3-in 1 out nozzle.
Because it is not a mixing extruder as only 1 filament can be used at a time, I said it was 3 extruders. I got an error though, which made me define 2 temp probes, which would be for the (non-existent) 2nd and 3rd extruders.
I set these to always report 25C (dummy values). Would this have any affect on when I would try to print? I think that just setting the preheat of the non existent ones to 24C would work.