For the past few days, I have been experiencing this failure. The first layer prints perfectly and then the printer keeps going through the additional layers but it doesn’t extrude any filament. The filament is coming from my AMS if that is relevant, but since the first layer prints perfectly I don’t suspect a problem between the AMS and the printer.
I have changed the hot end, taken apart and cleaned the extruder, and checked the filament sensor which appears to be working properly. The self-test process also completes successfully.
I’m out of ideas and would be grateful for any suggestions!