I found the service manual online and went through the troubleshooting steps. The motor windings checked out okay and the next step was replacing the control circuit board and motor inverter board. I found the parts easily on AppliancePartsPros.com and ordered them. They arrived a few days later, I installed them and the machine works like new. To troubleshoot this you need a basic volt/ ohm meter and the service literature, which you can find online. Thanks guys for getting me the correct parts quickly.