I had been printing all day yesterday with good results. Today when I tried to print something, the bed goes up to temperature as per normal but when the temperature reaches 50C, the target temperature for the extruder appears momentarily and then drops down to room temperature and the print job cancels itself. I have not changed or upgraded the software or any settings.
The extruder heaters work as I can manually set it to 190 and have been able to manually extrude.
Any ideas anybody?