We have a Whirlpool Duet Washer with an F11 Error Code. I bought both the Motor Control Unit and the Central Control units from Prism Parts and it's still not working and displaying the F11 Error Code What's next?

If you replace both and still get that error you have an issue in the wiring harness somewhere. Each wire between the boards will need to be ohm'd with a meter to find the one that is bad, each connector will need to be check for damage. I some cases the only solution is to just replace the entire wiring harness on the machine.