Washer shows an E53 code

Washer Repair
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Brand:Electrolux
Model Number: EIFLS60LT0
Main Symptom: E53
What happens & when: Starts washing then comes up with E53 error restarted and same issue.

Error Code (if any): E53
Parts or tests already tried:None
Photos / video link:

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Electrolux EIFLS60LT0 Front load Washer Service Data Sheet 137316000.pdf (226.8 KB)

Here is the tech sheet.

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Thank you — washer and dryer are stacked. Do I need to unstack them to get to the motor control board — and what would labor be for this — in Santa Barbara CA so every thing is expensive..