The FL fault code indicates the door not locking properly. You need to check the door latch. Not unlikely, you will need to replace it. Make sure the latch’s mechanism (the switch) is working properly, and the switch goes in and out freely with a click.
You many need to remove the latch to check it. To do so, undo the screws on the dispenser bezel. Then open the door and undo the four screws oon the frame: two on the left and two on the right (on the hinge). Once the front is off, undo the 25/16” screws on the corners and remove the top. Now, check the latch assembly.