Description:

The thermistor measures the hotend temperature, while the heating cartridge (also called a heater cartridge or heating rod) generates the heat. In the Ender 3 S1, these parts are designed for reliable performance up to ~300°C, making them suitable for a wide range of filaments including PLA, ABS, PETG, and TPU. If either component fails, extrusion becomes unstable, so replacing them restores proper hotend function.