The F11 code is caused by either a CCU failure or an MCU failure...here's how to tell:
If your machine starts a cycle and the water fills but the drum NEVER turns, your MCU is bad...it's most cost effective to buy a refurbished one and you can get them on eBay for $99 all day long.
If your machine makes it most of the way through a cycle but throws an F11 code during the rinse or spin, your CCU has the relay solder / vibration problem...and I can fix that for $65.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=181300988546
F11 Serial communication error
Communication between the Central Control Unit (CCU) and the
Motor Control Unit (MCU) cannot be sent correctly.
Possible causes/procedure:
1. Unplug washer or disconnect power.
2. Check wire harness connections to the MCU, the motor, and
Central Control Unit (CCU).
3. Check the drive system for any worn or failed components.
4. Plug in washer or reconnect power.
5. Verify CCU operation by running a Diagnostic test or any
cycle.
Service manual and more HERE
If you need further help, reach me via phone at https://www.6ya.com/expert/dan_73bbd84fe1d95b61
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