I just tried probing the bed thermistor aswell, it’s at 100k ohm which as far as i can read should be fine. I’ll try to update Klipper later. I found a schematic of the 4.2.7 board that you had posted some years ago Creality Board 4.2.2 and 4.2.7 Schematics and from what i can tell, the voltage divider of R66 and R67 is likely the culprit if the values you provied are correct