Klipper started throwing an error and shutting down while trying to heat the extruder. The extruder was cold, which basically meant a heater wire break. Thankfully it was very easy to find. So much for buying a nicer harness. Grumbles aside, I wonder if this wire got pinched when I assembled the chains, which lead to an early failure.
I didn’t have any spare PTFE wire on hand, so I spliced in a length of 16 gauge silicone wire and made sure to land the solder and heat shrink sections well away from any possible motion. I have replacement wire on order, but am tempted to run as is until it fails again…
I had the same issue after about a year of use. To fix it, I ran the temporary heater power cables alongside the reverse-bowden tube until my replacement wires came in. Learned along the way that the wire size I had been using for a Pharos Rapido was insufficient despite being the recommended size in the docs for standard heaters.
Disclaimer: I’m not a 3dprinter guy. I want to be, but I never found the time beyond a partially assembled prusa mendel i3.
…however, I have done an extensive amount of wiring, in various environments, a lot of it on moving parts, and what I can say is that wires of these gauges don’t break like this just from movement along that cable chain (or whatever it’s called), unless it’s incredibly cold environment and/or incredibly cheap wiring.
I’m thinking that you’re most likely correct in that it has been pinched.