[heater_bed]
heater_pin = PB10
sensor_type = Generic 3950
sensor_pin = PF3
max_power = 0.6
min_temp = 0
max_temp = 120
control = pid
pid_kp = 40.842
pid_ki = 1.341
pid_kd = 310.906
With the max power capped at 60% (line 5) and a requested temperature of 115 °C, your bed’s heater is likely simply too weak.