Bambu Lab 3D Printer Error Code 0300_3000: How to Fix It

Easy 10-30 minutes Low Severity Verified June 2026
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Error Code
0300_3000
Brand
Bambu Lab
Product Type
3d_printer
Severity
Low
DIY Difficulty
Easy
Estimated Fix Time
10-30 minutes
Bambu Lab error code 0300_3000 means the AMS (Automatic Material System) hub is unable to detect filament in one or more of its slots. This typically happens when filament has run out, is tangled, is not properly loaded, or when the filament detection sensor inside the AMS is dirty or malfunctioning. The good news is that this is a low-severity error and can almost always be resolved at home without any special tools or technical expertise.
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Tools You'll Need

How to Fix Error Code 0300_3000

  1. Check Filament Levels in All AMS Slots

    Do not force filament into the slot. If you feel significant resistance, stop and check for a tangle or clog before proceeding.

  2. Reload Filament Properly Into the AMS

  3. Inspect and Clean the Filament Detection Sensor

    Always unplug the printer from the wall outlet before cleaning internal components to avoid electric shock.

  4. Check the PTFE Tubes Inside the AMS

  5. Check the AMS Hub Connection and Cables

    Power off and unplug the printer before disconnecting or reconnecting any cables to prevent damage to electronics.

  6. Update Printer Firmware

    Do not power off the printer while a firmware update is in progress, as this can corrupt the firmware and require a factory reset.

  7. Perform an AMS Calibration or Reset

Parts You May Need

AMS PTFE tube
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AMS filament hub cable
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AMS filament runout sensor
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AMS PTFE tube
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AMS filament hub cable
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AMS filament runout sensor
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AMS PTFE tube
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AMS filament hub cable
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AMS filament runout sensor
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When to Call a Professional

Contact Bambu Lab support directly if error code 0300_3000 persists after completing all steps above, especially if the filament detection sensor appears physically damaged, a PTFE tube is cracked or melted, or the AMS hub itself does not power on or respond. You should also reach out to support if the AMS cable shows signs of fraying or burning, as this could indicate an electrical fault that requires a replacement part shipped from Bambu Lab. Bambu Lab has an active support portal and community forum where their technical team can assist with warranty replacements for defective AMS components.

Frequently Asked Questions

What does Bambu Lab error code 0300_3000 mean?
Error code 0300_3000 means the Bambu Lab AMS hub cannot detect filament in one or more of its slots. This can be caused by an empty spool, improperly loaded filament, a dirty runout sensor, a blocked PTFE tube, or a loose AMS cable connection.
Can I still print if I get error 0300_3000 on my Bambu Lab printer?
Yes, in many cases you can continue printing by bypassing the AMS and loading filament directly into the printer's external spool holder. You will need to disable AMS in Bambu Studio for that print job and manually feed filament through the AMS bypass slot on the side of the printer.
Why does my Bambu Lab AMS keep saying it can't find filament even though the spool is full?
If the spool is full but the AMS still reports no filament, the most likely causes are that the filament tip was not inserted far enough to trigger the sensor, the filament runout sensor is dirty or obstructed, or there is a kink or tangle in the PTFE tube preventing the filament from feeding forward. Try re-cutting the filament tip and re-inserting it, and clean the sensor area with compressed air.
How do I reset the AMS on a Bambu Lab printer?
You can reset the AMS by going to Settings on the printer's touchscreen and navigating to the AMS section, where you can find options to reset slot assignments and re-calibrate the system. You can also reset and reconfigure AMS slot settings through Bambu Studio on your computer under the Device tab for your printer.
Will a firmware update fix Bambu Lab error 0300_3000?
A firmware update can fix error 0300_3000 if it is caused by a software bug or communication error between the AMS and the printer. Bambu Lab regularly releases firmware updates that improve AMS reliability and sensor detection. It is always a good idea to keep your printer firmware up to date as a general maintenance step.

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