Honestly I don’t understand this thing about the sensor calibration. On the one hand the sensor seems to be working out of the box as most people (me included) ca use auto leveling with the default setting. Otherwise, there is a thread in the FAQ mentioning you have to calibrate the sensor before you can use it?!
I had a close look on the extruder when it’s coming down to the platform and I can’t see any red light?!
@DroneOn. Did you run the calibration with the printer powered off like Kerrida described in this article?