Thank you for your question and I understand your concern.
The "F28" fault code indicates the communication between the Central Control Unit (CCU) and the Motor Control Unit (MCU) cannot be sent correctly.
Since it appears to be an intermittant issue, I suspect it may have a loose wire connection or a faulty Motor Control Unit (MCU).
Possible Causes / Procedure:
Unplug the washer or disconnect power.
Check wire harness connections to the MCU, the motor and Central Control Unit (CCU).
Check connections of the CCU board within the housing.
Make sure all grounding switches are engaged.
Check the drive system for any worn or failed components.
Plug in washer or reconnect power.
Verify CCU operation by running a Diagnostic test or any cycle.
Check the MCU by looking for operations of the drive motor.
Check the drive motor for powered rotations.
I strongly suggest calling a service technician to diagnose and repair your washer
If you do not feel confident repairing this problem yourself, then you can have it repaired at your home by a Sears technician. Here is a link for the website:
You can have it repaired at your home by a Sears technician. Here is a link for the website:
Sears Home Services.