I have an Otis 211 that was having intermittent FLRP issues and shutting down. Turned out that the magnets were curling off the tape and causing the issue. We glued the magnets and the problem went away for several weeks then happened again once. We went on site and cleaned the tape, checked the guides, and blew the selector head out but the owner was inquiring why it went down again. We told him it had the potential to be a dead magnet, debris in the head, or there could be an intermittent selector board issue but we should wait to see if it happens again and try and troubleshoot further. Owner was insistent on purchasing a board. So we did and went to change it and it's completely dead. Not recognizing any magnets or lighting any LEDs. Because it was working before we put the old board back in. It worked correctly for a few runs and started over shooting the floors and giving a RELD fault. The tech removed the board and inspected it and could find no issues. We've checked all the wiring across the car top. Re checked the tape and magnets all multiple times. The units is reading the magnets it's just not stopping at the floor correctly. Turned the unit off over night and came today and powered it on and it leveled right up to the floor and was working correctly at every floor for 5 or so runs. Then it started acting up and shutting down with the RELD fault again. Anybody have any thoughts?