An FL code could also be that there is a flow restriction. Have you pulled out your filters and cleaned them out? There might be leaves or other debris located in the pump as well and unfortuantly for most dealers and manufactors, that is not covered under warranty, so you might want to check if it isn't too late, before somebody comes out to check it out. Have you also tried unplugging the tub or flipping the breaker off and then turning it back on, it could just be a fluk in the computer system!