The machine does not work on high or medium load cycle. Does not work on Normal load. Only works on Sport/Low. It also does not work on Hot/cold or warm/warm water.
Given that all of these function come out through the central control unit, I would suggest that the CCU board is your problem.
Unfortunately, this is an expensive part, and I cannot guarantee that this will fix it, but it is highly likely.
The replacement is fairly easy if you want to do it. Here is your part.
Part Details - FRIGIDAIRE CONTROL BOARD, part number: 137005000
Good luck and let us know what you decide to do and how it turns out.