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MMU3 3.0.4 error but printing  

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Mugatuu
(@mugatuu)
Member
MMU3 3.0.4 error but printing

Just loaded up the new Core One Firmware and flashed the MMU3. Started  a 2 color test print. 

It pulled in tool one fine, then popped up the error: FSENSOR FIL. STUCK, but it's printing fine?

It's currently printing the first few layers with tool 1 like it should. Error displayed in Pursa connect and on the screen.

Not sure what's gonna happen when tries to swap to tool 4. Will report back.

Posted : 25/03/2026 11:51 pm
Mugatuu
(@mugatuu)
Member
Topic starter answered:
RE: MMU3 3.0.4 error but printing

It printed fine until the tool swap.  Went over to the wipe tower and just stopped.  I couldn't use the local LCD to "retry" or send commands via prusa connect.  Had to hard reset.  

Upon restart, I was able to run the unload operation just via the MMU menu.

Posted : 26/03/2026 12:06 am
Mugatuu
(@mugatuu)
Member
Topic starter answered:
RE: MMU3 3.0.4 error but printing

Support had me reset the MMU3 with this procedure:

please run a hard reset to the mmu3 unit following this guide, seems to be a glitch in the firmware version: https://help.prusa3d.com/article/factory-reset-mmu_510075

Seems to have addressed it.

Posted : 26/03/2026 12:41 am
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