Went out on a general "unit doesn't work" complaint. Found the unit with water in the drum.
Put into drain and spin. Drain pump activated for a few seconds and shut down. While it was running it ran great.
Asked for an error code, machine told me it was fine.
Put the unit into its component testing. In each component test -- hot valve, cold valve, door lock, spin -- the unit would go for a few seconds, shut down, and flash all its lights.
Got to the end of the component test and unit gave me an "E59" -- tachometer error.
Don't know Frigidaire FLs that well, but would a tachometer error really shut me down on a water valve or door lock test? That doesn't pass the smell test to me.