I’ve just recently run into an issue where the hotend doesn’t seem to heat up anymore. The process starts but fails without the nozzle heating. The thermistor looks to be accurate.
Is the heating element protected by a fuse? If so, which one? I was going to replace that and then maybe recrimp the wires in case there’s a failure there somehow.
I passed 3km of filament on this extruder last month so I think it’s probably about time for something like this to wear out.