How to quickly diagnose Bambu A1 extruder filament errors.

This shows a quick complete assessment of the A1's extruder to check for problems in the filament pathway. It's particularly relevant to the misleading error message "Timeout while purging old filament. Please check if the filament is stuck or the extruder clogged." (Assuming that there is in fact no stuck filament) In a follow-on video, I show how to fix the design flaw in the filament detection sensor that causes this problem:    • How to fix Bambu A1 filament sensor design...   Note that if this is in fact your problem, doing a warranty replacement of the filament sensor will not solve the problem because that component doesn’t include the lever mechanism. You would need to replace the buffer and hope the replacement has this design flaw fixed. https://wiki.bambulab.com/en/a1/maint... Sorry I've done no editing so you'll have to manually fast-forward through all the wrench-turning and fumbling :)