My LCD gives me the error "mintemp". I asked tech support and was sold a new thermistor which I installed to no avail. Tech support no longer responds. Anyone got any ideas? This was after the failure of the EXTRUDER stepper mother which I replaced, breaking the fan in the process (also replaced) only to end up stuck with this "mintemp" error. Printer was working fine until the EXTRUDER motor gave out.
I replaced thethermister and fiddled around in other ways I cannot remember and am now up and running. I think re booting everything was important. Sorry to be so vague, but the new parts including thermistor, fan, and extruder nozzle seemed to fix my problems. Getting the assembly exactly right and everything seated firmly was important. Good luck