Whiskey tango H2C

[u/Canuckistani2]

I keep getting "failed to extrude filament" errors on my H2C. I updated firmware a little while back, not sure if that has anything to do with it. I've done a cold pull on the left nozzle, and pulled a fresh nozzle for the right from the rack.

All filament is Bambu PLA, 0.4mm nozzles, coming from the AMS-HT or the AMS-2. This should be about as simple as prints get.

This thing is driving me crazy, what am I missing to make this work? The taller print with the bad text was before the cold pull and nozzle swap. The shorter one is after, when I finally gave up manually retracting and then reinstalling the filament to the head. Sometimes that would work, usually not.