Bambu Lab H2S — Problems and fixes
Common problems on the Bambu Lab H2S and what to do about them. For fire, smoke or an electrical fault, and for a fault you can't fix, see the H2S page first.
What you may fix yourself
You may follow Bambu Lab's official troubleshooting guides, as long as the fix needs no screws removed and no wires disconnected. If it does, post in Slack and wait for a room developer or board member to reply before you start. Taking a PTFE tube off is fine when the official guide says so, as long as you put it back exactly as it was, pushed all the way in. Changing how filament is fed is never a fix.
Common problems
What you see | What to do |
|---|---|
A print has obviously failed | Anyone may stop it. Tag the owner in the Slack channel |
The spool won't lift out of the AMS | The filament is still in the printer, so the job was cancelled or hit an error. Run Unload on the screen. |
Filament will not feed in or out | Do not force it. Check the AMS light (Bambu Lab AMS 2 Pro — Problems and fixes), or ask in Slack. |
A weak or uneven line, or nothing comes out | Possibly a clogged nozzle. You may use Bambu's cleaning-needle method (the needles are in the drawer under the left H2S): set the nozzle to about 10 °C above the normal printing temperature, never higher (2.10 Faults, clogs, and how far you may go). No open flame, so not the hex-key-and-lighter method. Bambu's H2S nozzle clog guide also covers steps members may not do, so stop where it needs higher temperatures, tools or a nozzle change, and ask in Slack. |
A print comes out a mess, or the nozzle jams, after a hotend change | The slicer and the fitted nozzle probably do not match. Stop, and check the nozzle size on the screen against Bambu Studio. |
An AMS light or message |