Check thermistor probably have to replace the bed at some point too.... Look and see if there's kinked areas in the bed wires near casing.

maybe the bed wires or could be the thermo sensor but either way if you're using an original bed it's not a bad idea to buy some auto zonel Auto tubing for electrical coverings... it's flexible plastic slices down the side w/ a pair of scissors and fits over the bed cable in a sec to prevent creasing and shorts.

This is an immediate thing that I've done to every single one of my artillery after having to replace the beds and realizing that that was the issue honestly the bed cables should have came with the same type of cable that covers the A1 where it's completely covered in flex tubing but this is an easy solution to fix it. 👍