I have changed my hotend on my Ender 3 v2 with Dragonfly BMS.
In effect, because I wanted to reach higher temperatures, I also changed the thermistor with one that is 3mm wide and does not have the bead shape.
This is what it looks like
The connector is the same as the Creality Ender 3 v2 one (JST).
It was listed as "HT-NTC 100K 3950 Thermistor for Reprap Hot-End" and "Working temperature: -50 °C ~ +350 °C, can replace the original K-thermistor. Suitable for printing high temperature filaments."
I replaced the stock one and did a PID callibration.
However, when I attempted to print parts, first I observed bubbles and degradation of the fillament (PETG at 240 and PLA at 200). I tried lowering the temperature and it started printing well (PETG) at 200 C, which obviously is way too low. Same goes for PLA, which I can't print over 170.
Does anyone have experience with this kind of problem? I have access to modifying Marlin firmware. I am not sure if this is a different type of temperature sensor.
I'm using OCTOPRINT to see the temperature.
When the sensors are off the hot end reports 22.1 degrees while the bed reports 22.