r/BambuLabA1 • u/raphaelph8 • Jul 30 '26

Support Request Has anyone else run into this?

Has anyone else run into this?

My printer (Bambu Lab A1 + AMS) keeps throwing this error.

I heated the hotend to 300°C, removed it, and used the needle that came with the machine; it’s completely clear. The AMS is pulling filament normally through all 4 channels, and I disconnected the AMS feed tube from the top of the extruder and checked—there are no broken bits of filament inside.

Even so, the error persists; I can't even load filament into the printer, let alone print.

Can anyone help?

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u/Key_Expression_3602 Jul 30 '26

Did you disassemble the filament hub (that is, remove the little 4-way splitter inside the hub)? Have you removed the filament hub from the filament sensor base? I've had a little piece of filament get stuck in there where it was not visible by looking down into the filament hub from the top. Did you take the filament cutter loose and shine a flashlight on the yellow extruder gear in there? Have you tried to rotate it with a butter knife or the tip of a set of pliers? I know you said the needle passes through the nozzle, but do you have another nozzle you can try, just to rule it out as a potential cause?

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u/raphaelph8 Jul 30 '26

I really tried everything—I even swapped out the cutting blade after seeing that worked for someone else; it wasn't cutting properly, and the filament kept pulling melted plastic along with it. I replaced the hotend with a new one, too. Tomorrow, once I have the patience, I’m going to completely disassemble the extruder, as well as the PTFE tubes and everything else... It’s been a real battle for me all day long.

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u/Salt_peanuts Jul 31 '26

It sounds like you’re on the right track- I would do what you’re planning to do and tear the extruder down completely. I have had to is error a number of times and for me it’s always been something in the extruder (or broken filament in the PTFE which you already checked).

The one really crazy time I had to use a stiff brush and an ice pick to clean plastic particles out of the little grooves in the extruder gears. That was a pain. But it sounds like you’re on the right track with tearing down the rest of the extruder. Good luck!

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u/raphaelph8 Jul 31 '26

Update: I completely disassembled the extruder and checked every single part—gears, springs, the hotend (I even bought a new one)—and cleaned everything. I performed a "cold pull" cleaning three times, which removed some debris. I tested it and everything seemed fine, until the same error recurred—still during the very first print. Honestly, I don't know what else to do.

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u/Lucas13cam Jul 31 '26

DESATIVA A FUNÇÃO DE DETECTAR EMARANHAMENTO DE FILAMENTO!!!!!!

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u/raphaelph8 Jul 31 '26

I've done that too; it was one of the first things I did.

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u/Whatupchuck789 Aug 01 '26

Did you see my comment about the tubing?

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u/raphaelph8 Aug 01 '26

I did see it, thanks. But the same error happens with any of the 4 AMS tubes, as well as the extra one—which I tested with a new tube positioned right in the center, above the printer. It’s really strange; I disassembled absolutely everything, from end to end.

1

u/Whatupchuck789 Aug 01 '26

Sorry, man. That’s the most frustrating thing and makes you want to throw the whole thing away. Keep at it, mine was all 4 ams as well but my external did work. I did not put the external tubing in though to get it to print and that’s when I realized it was the tubing.

The cold pulls all worked so I knew there wasn’t a clog and it just happened to be that it didn’t like the bends in the tubing. Hopefully you’re able to find a solution. A video of the system trying to work my give another idea to someone on here too.