Ultra Quiet II is not working right

I have a Frigidaire Ultra Quiet II roll-around dishwasher that is not washing dishes. It runs through the cycles, barely sounds like anything is going on inside, spits water out the drain spout a few times between cycles, then stops when the dial is at the bottom, not going through the completion of the 'normal wash' cycle. I opened the door after waiting about 20 minutes for the cycles to complete. Steam was coming out like the heated dry cycle was in process, but all dishes were still grimy and looked like they had not even been sprayed down. I tried the dishwasher on both pots and pans and normal wash cycles and got same results both times.

Can anyone offer a suggestion on what part(s) may be bad. Pump motor? Possibly the main switch?

Thanks.