MK4 instructions are not ready yet, so I'll write them down under each relevant step for those that had received their thermistor connector crushed like me. Thermistor for MK4 is a different kind - it's pretty flat and looks more like a ribbon cable than wires - think those flat orange cables for Raspberry Pi cameras. Keep this in mind for later.
I ran into this error with my printer after about a year of use, so I ordered the replacement kit. I do plan to use the kit, but got frustrated waiting on FEDEX delivery. So with nothing to lose, I decided to try making a repair. Using the "flexing" technique, I quickly found the cable's bad spot, next I split the two conductor wire into two single conductors, cut out the bad part, and spliced around it with shrink tubing and a solder joint. Likely not a long term solution, but this fix enabled me to continue to print while waiting the replacement kit. So it is possible to make a short term repair, if you have the skills to do the above.
Thermistor for MK4 is a different kind - it's pretty flat and looks more like a ribbon cable than wires - think those flat orange cables for Raspberry Pi cameras. Keep this in mind for later.
Likely not a long term solution, but this fix enabled me to continue to print while waiting the replacement kit. So it is possible to make a short term repair, if you have the skills to do the above.
If the soldered joint isn't at or near the part of the cable where it moves, this fix might survive well enough :)