E20 error message

I am recving an E20 error message on my Frigidaire Affinity Front Load Washer, Model LTF6000FS0, yet my washer is is draining but it is not spinning. The motor is running but there is no movement in the tub. I had a repair guy come out and he moved some wires and it began to spin and it worked twice but I am running a load now and I am recving the E20 message and the tub is not spinning again. My washer is only 1.5 yrs old. The repair guy told me I may need a new control panel if the message comes back but that sounds expensive for a machine that is not even 2 yrs old. Any ideas?