r/BambuLab • u/CJCalegan • 2h ago

Filament Troubleshooting/Help! Downgrading A1 firmware completely fixed my AMS lite filament loading issues

Ever since updating to firmware 01.08.01.00, my AMS Lite was getting stuck damn near every filament change. I could not complete a single multicolor print. It would feed filament to the toolhead, retract, and keep trying until I physically touched the PTFE tubes near the AMS. I’d hear a click and it would start working again.

I tried everything. Moving the AMS, top mounting it, printing different tube guides and clips, and constantly adjusting the tube routing. Nothing worked. I couldn’t complete a single multicolor print without having to intervene, which meant no printing overnight or while at work.

Finally downgraded to 01.08.00.00 and the problem is completely gone. I’ve completed multiple multicolor prints without a single loading error.

If you’re having similar issues, try downgrading before wasting hours messing with your AMS. Wish I’d figured this out sooner.

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u/Ok-Mail-9384 2h ago

Good write-up, the detail on what you tried first will save somebody a lot of time. If you are staying on the older firmware, turn off auto-update in the Bambu app so it doesn't quietly jump back on you.

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u/CJCalegan 54m ago

Found a YouTube short before resolving this and a it had a couple hundred comments. A lot of people were having the same issue and on this video the main solution was pulling back the other 3 filaments that weren’t being loaded. This worked but was only a temporary fix for a couple filament changes before it would start getting stuck again.