I have a Taz 5 with the Dual Extruder V3 head. Prior to now the head had been working flawlessly on either extruder or both.
It sat for around 4 months unused (terrible, I know!) and now gives me a ‘E1 heating failed’ error when I try to get it set up for a print. I usually use the right extruder for single color/material prints. It will get most of the way up to temp and then fail. Seems to happen just past 200C. The left extruder seems to be ok, getting up to temp and holding it well. I try to reserve this nozzle for flexible/dissolvable materials.
I am running he 18.104.22.168 firmware, cura 2.6.69, but using Octoprint. My head appears to be one made just after the thermistor problem SN KT-CP0127-0494, so I wonder maybe it slipped?
What causes this error?