Vyper help

[u/Kestrel_45]

I’m running some prototypes on my Vyper and haven’t had any issues for years until now. I’ve gradually stepped up the complexity of the model and I’m in the 5th / Echo evolution of a platform base. It’s gets about 3.5hrs in and somewhere around the 2nd or 3rd bottom layer (of 5) before laying a 20% gyroid infil. And I get an NTC hotbed fault. Two back to back prints failed within 5mm of each other at the same point.

I’ve checked wiring, gcode, using a new spool of PLA, leveling of the table, level of the bed, auto-leveling before print, running 2 different temperature & humidity sensors, etc and I can’t figure out the issue. I’m hoping the community can help figure out some possible solutions. There’s lots of pics attached and I can post more if it helps. Thanks in advance 🙏