Product review (5 stars): Washer Sensor Replacement
I kept getting the error code for balance/spin issues. Common issue with the OEM part is design of the circuitry on the printed circuit board, where the thin traces on the board get broken easily and lose signal to the hall effect sensor. The hall effect sensor is used to sense tub/motor rotation speed, out of balance conditions. Once this product arrived and I installed, the washer worked like a charm. If you're seeing balance/spin problems consistently then this might be the culprit.

Replacing it is challenging for those not mechanically inclined, but not impossible. I think any washer repair person will want greater than $400 to replace this simple part. Care must be taken not to break electrical connectors, and plastic clips which keep this sensor in place next to the motor. Its possible to DIY, just be careful.