Nozzle Temperature Fluctuation - Ender 3 V2 Neo

Hello, during my prints I noticed that the nozzle temp fluctuates for example if the nozzle temp is set to 220C it fluctuates from 220 to 210 and slowly back up to 220. If it is set to 200C the biggest it did was from 200 to 174. And I haven’t seen what temp it goes down to, but about every hour it pauses and complains that the nozzle temp is too low. Any suggestions welcome.

Check for loose connections on the low voltage wire and the thermistor wire on the extruder and at the printer end. If everything is tight then the thermistor may need to be replaced.

Thanks for the help, I replaced the thermistor and it is working good again.


Hi there. I need to replace the thermistor on my V2 Neo, too, but am not completely sure if this is the correct part : Official Creality Ender 3 Series Nozzle Thermistor – 3D Printing Canada

Alternatively, which part did you use? I’ve been looking at Amazon, etc. and, not knowing what the thermistor actually looks like, I have no clue which is correct.