HAD A REPAIRMAN HOOK UP HIS COMPUTER TO THE CODE, THEN HIS REPAIR PROGRAM ON THE LAPTOP COMPUTER SAID IT WAS THE SENSOR ON THE BOTTOM OF THE TUB UNDERNEATH AT THE BASE OF THE TUB, UNHOOK THE WIRE HARNIS, REMOVE 2 SCREWS , A 3 WIRE HARNIS, REMOVE AND REINSTALL THE NEW SENSOR, REATTACH THE 3 WIRE HARNIS THEN THE 4 WIRE HARNIS, 2 SCREWS AND YOUR DONE, NO SPECIAL TOOLS NEEDED