Old thread but heres my issue that got fixed and its partly my fault. The issue isnt my fault but other things were which ill get into.
First I kept getting filament cutter stuck/ filament sensor error. Long story short, did all the troubleshooting it was the filament sensor.
Now for the part that was my fault, I thought I could save some time by ordering the replacement part on Amazon. I know Bambu Lab doesn’t sell on there so I took a chance, gambled and lost. The part I got from Amazon was straight up counterfit, not even a part taken out of a parted out A1 so after a month trying to figure out what was going on and contacting support. I decided to buy the filament sensor from Bambu and then I compared the two.
The one from Amazon didnt have as long of contact points like the legit one from Amazon and the writing on the sensor was different.
So after placing the Bambu sensor in it worked.
Moral of the story just buy from Bambu
But back to the printer I only had the printer for a week and a half when it crapped the bed.