The Heaters Tab defines the bed and tool heaters, and sets the parameters of the thermistors.
Change the bed heater control method to PID.
Set the bed temp limit to 80c (limit for the magnetic bed surface)
Set the Nozzle temp limit to 250c (limit for the PTFE tube in the hotend)
Set the values for both Thermistor values as: R25 – 98801, B – 4185, C - 0
Those values are accurate for the stock Ender 3 thermistors provided by Creality. If you have a different aftermarket thermistor, you'll need to get the values from the manufacturer, or derive them manually. Generally though, R25 = 100000 and B = 3950 is fine for a generic NTC 100k 3950 thermistor.
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