Kenmore HE5t washer with error code F71 and won't run
Do the test on this page. If unplugging the blue harness from the MCU results in the control panel lighting up normally like the machine wants to run (but can't because the blue wire is unplugged from the MCU), then...
Unplugging the blue harness from the MCU resulted in the control panel lighting up normally.
You be needin' one of these:
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Source: Kenmore HE5t F71 error code and won't run