Since we are not present to play around with your machine we really need you to be our eyes on the ground. Can you give us a detailed description of the problem including age of the machine, any previous repairs, whether or not the problem is in all cycles, whether the problem is after the wash cycle and rinse cycle or just one, etc, etc.

With more detailed info someone should be able to assist you.

Thanks

will not spin on any of the cycles, sometimes there is still water in tub

Use this service manual to check the pump and drain hoses for an obstruction or problem. Then see if you can generate some error codes. Yours is the good model and the error codes are displayed by blinking lights. The service manual will tell you how to interpret them.

http://frigidaireservicetips.co...rizontalAxisWasherSM.pdf

Which code number did you get, and are you still getting the same one?

You are experiencing what is the inherent weakness in machines with microprocessor controls, which is that the internal diagnosis is just not reliable.

The result is that you end up spending a lot of money on parts that do not fix the problem, and have to replace parts on speculation. Your motor/speed control board is the next culprit, but let's see what you have before spending more money.

Well your error message does indicate the control board, but as I said, the diagnositics are just not all that reliable when the electronic components are the problem. I think the speed control board is likely the problem since it controls spin and if so, then replacing it is the correct action and hopefully will fix things.