The Creality K1 Series Toolhead PCB upgraded board works perfectly with the K1, K1C, K1 Max, K1 SE 3D printers which have the new version of the unicorn hotend.
Please note: If you are not sure whether your printer is the new version, please check whether the thermistor terminal and the ceramic heater terminal of the hotend kit are the new version. The new version of the hotend terminals is the buckle version. See below for a visual reference.
