F28
Maytag
Serial Communication Error (CCU to MCU)
Washer shows F28, may not start or may stop mid-cycle, often with no drum movement.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Loose or damaged communication harness, failed motor control board, failed main control board, electrical interference
How to Fix / Troubleshooting
Safety first: Unplug the washer before accessing controls or motor.
Step-by-step:
- Access CCU and MCU: Remove the top panel to reach the CCU and the rear or base panel to reach the MCU.
- Inspect harness: Locate the communication harness between CCU and MCU. Unplug, inspect for damage, and reseat both ends.
- Secure routing: Ensure the harness is not rubbing against sharp metal or moving parts.
- Board inspection: Look for burnt or damaged components on both boards.
- Replace components: If wiring is intact and F28 persists, replace the motor control board first. If still unresolved, replace the main control board.
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Repair Difficulty
Professional Required
5/5
Required Part
Motor Control Board (MCU)
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