Had a similar issue. Can you connect to the printer, home it, check the status of endstops using M119 paying close attention to Z_MIN. Then move the toolhead down so that it touches the probe and check M119 again. If it still says OPEN then it’s not reading properly. With the parts touching, turn off the printer and check continuity between top of head and bed plate with a multimeter.
I had this same issue and changing the head fixed it for a while. After using the new head for a few prints Z_MIN went into an always TRIGGERED state and was autoleveling in the air. Had to fix it in firmware: