Editing Blog/2025-12-12/Spaghettification (section)

== The Old Ways Of Fixing ==

I went to our friendly neighbourhood LLM and asked it what the situation was and it told me that everything was done and there was no way out. I'd have to buy a whole new hotend assembly. "You can't salvage the thermistor", said the GPT, and I listened and ordered the assembly. But the accessory box that the Bambu P1S came with also has a replacement nozzle that is surely included because a bunch of newbies will do exactly this. [https://www.youtube.com/watch?v=5580yf7T-1E I found a YouTube video to replace the nozzle keeping the fan and thermistor] and the whole operation was honestly kind of trivial and took me some 20 minutes, but only because I watched the whole thing to see if I'd need anything special and then rewound and followed instructions, skipping forward to confirm.

In one sense, I got annoyed at the LLMs for all telling me this was unfixable (how easily we get used to their infallibility) but in the other I am gratified that the old ways of watching a YouTube video still work. The general truth is that with most of this software, GPT-5.1, Gemini 2.5 Pro, and Claude 4.5 Opus all seem to have an ancient view of everything. They think there are settings which aren't relevant and don't generally seem to be aware of fixing these things.

Once I got everything sorted and managed to print a couple of test prints, I took a closer look at the old nozzle and boy was it messed up. Plastic filled the inside and was crusted on the outside where it's supposed to pop out. Overall, I'm sure it would have been recoverable at the limit by heating it and doing something, but I don't think I could have gotten it to adhere properly to the rest of the assembly.

Everything has been fine so far after that.

[[File:Bambu P1S - broken nozzle.webp|thumb|left|And the remains of the old nozzle and heatsink.]]


{{#seo:|description=Bambu P1S hotend disaster: A cautionary tale of how filament setting overrides and PETG mishaps can lead to a ruined nozzle.}}

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[[Category:Troubleshooting]]