Hi.
It is probably the CCU (main control). Wiring harness, motor and drive train must be checked before replacing the CCU.
Here full troubleshooting for F11.
F11
is communication error between CCU (main control unit) and MCU (motor
control unit - additional control module connected to motor and to CCU,
located in a sealed box inside the washer).
This
usually means that either CCU or MCU is defective. In some case the
connectors or the wiring harness connecting the two modules is the
problem.
The tech sheet says:
F11:Serial Communication Error
Communication between the Central Control Unit (CCU) and the Motor Control Unit (MCU) cannot be sent correctly.
Solution:
* Check Wire Harness connectors to the MCU, the motor, and Central Control Unit (CCU)
* Check the Drive system for any worn or failed components
* Check MCU
* Check CCU
* Check Motor
* Check Wire Harness
The
wiring harness is tested using a multimeter to ensure that there is
continuity between the MCU and CCU connectors. If a single wire is good
it will read zero Ohms (closed) from contact to contact.
Motor is tested reading Ohms, it must be read about 6 Ohms on three different pairs of contacts.
Drive system in motor is checked observing if any of the parts are broken.
MCU
and CCU are tested reading volts during operation and testing at
component level. The testing must be done by a tech. Check CCU to see if
there is any sign of failure (eg burnt spots).
Most of the time
the problem is CCU. Trick to repair it include testing and eventually
reheating the solder joint of the two on-board relays, cleaning
connector contacts with circuit cleaner solution. This in case that the problem is CCU.
Disconnect the unit from power for five minutes as first test. This will reset CCU.
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Have you tested the door latch solenoid for proper operation? Are you aware this is problem of epidemic porportians? it is called the Whirlpool kiss of deathe code, it should be recalled, contact Whirlpool on this.
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