Answer Hello Banerick, F6E1 indicates communication between the Central Control Unit and the MCU has not been detected. Possible Causes • Check door switch operation. Faulty switch may interfere with power to MCU. • Check drive system for worn or faulty components.• Verify continuity in cable between CCU (MI3 & MS2) and MCU. See tech sheet for specifications and tests to perform. Read More... Answered by AppliancePartsPros.com | Monday, October 20, 2014