A thermistor is a temperature-sensitive resistor that monitors and controls the heat of the printer’s nozzle. Ender 3 V2 nozzle thermistor ensures the correct temperature is maintained for consistent filament extrusion. Accurate readings prevent underheating, overheating, and erratic printing behaviors, which are essential for achieving smooth, high-quality prints. https://www.tripoto.com/trip/why-a-faulty-nozzle-thermistor-can-ruin-your-3d-prints-62efa9450894f120