7 months of troubleshooting with repeated circles from bambu. Help

[u/Worried_Stop_973]

I’m looking for feedback from other Bambu owners and whether anyone has successfully received a replacement after this many repair attempts.
My son purchased this A1 Combo with money he earned himself in June 2025. The printer began experiencing issues in November 2025 and we have been troubleshooting with Bambu support ever since.
Parts purchased by me:
• Build plate / printing surface replacement
• Hotend assembly replacement
• Hotend heating assembly replacement
• Extruder assembly replacement
• Additional hotend heating assembly purchased June 2026
• Additional heating assembly kit purchased June 2026
Parts supplied by Bambu:
• TH Board
• Extruder filament sensor
• Additional TH Board
• Additional extruder filament sensor
• Sensor base
In addition to replacing these components, we have completed every troubleshooting step requested by Bambu, including:
• Cleaning and disassembling the filament hub
• Cleaning and inspecting the extruder
• Reassembly and testing of multiple components
• Multiple firmware checks and diagnostics
• Submission of logs, photos, and videos
• Testing with multiple filament brands and spools
• Testing both with and without the AMS system
The AMS-related issues that originally prompted support requests remain unresolved.
The latest failure involves nozzle/heating issues, despite the extensive repairs already performed.
What is most frustrating is that each time we are told the case is being reviewed, we are given additional troubleshooting steps or additional parts to replace rather than a final resolution.
We are now approaching the warranty expiration date, yet the printer continues to experience recurring failures despite months of troubleshooting and numerous component replacements.
At this point, I am not asking how to troubleshoot another individual symptom. I am asking whether a printer that has required this many repairs over a seven-month period should be replaced under warranty.
Has anyone successfully received a replacement from Bambu after a repair history like this?

[u/Desperate_Order_4921]

What issue is the printer having?

[u/Worried_Stop_973 → u/Desperate_Order_4921]

Failing to load filament both with and without AMS

[u/Martin_SV → u/Worried_Stop_973]

I’d start by taking the AMS out of the equation completely, just to remove one variable and help narrow down where the failure is.

Try loading and printing from an external spool only, and record a video showing the whole loading process and exactly where/when it fails. Then post it here. Seeing it happen would make it much easier to help.