The bed thermistor wires are probably shorted together (very easy to do at the thermistor end)
The temperature sensor is a thermistor, which is just a resistor that changes resistance with temperature
It has a negative temperature coefficient, which means that the higher the temperature, the lower resistance it has.
A short would read maximum temperature
unplugging the bed thermistor should make the display read a very low bed temperature
Edited 2 time(s). Last edit at 02/06/2024 05:53PM by Dust.