Quote Originally Posted by Mjolinor View Post
If you do not know what thermistor is fitted then how did you pick the right one when configuring your firmware?

Maybe you just have the wrong one selected in configuration.h (assuming it uses Marlin)
You can ask the seller or techique support what thermistor is fitted. Maybe I misunderstood your words at the beginning. It would be better if you describe your problem with some photos or video.