I have been having problems printing with my P1P/S in that I can load filament and manually extrude it. However, when trying to print nothing comes out. I have disassembled everything back to the extruder and all is well. I have also swapped filaments. Both nozzle and extruder are recently upgraded from stock to hardened and were performing flawlessly until suddenly stopping. Original filament was PETG. New filament is PLA+.
Did you check nozzle temps while it was trying to purge the old filament? Did they go to the higher melting temp of PETG?
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As @EnoTheThracian suggested, check the nozzle temperature. If that isn’t the problem, here is the wiki for a clogged nozzle. It’s for the X series printer but is very similar other than the display differences.
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