⚠️ Safety Warning: Appliance repair involves electricity, gas, and moving parts. Always disconnect power before working on any appliance.
Error Code: Dishwasher Difficulty: Moderate
Problem: Motor Control Unit (MCU) / Main Board Communication
How to Fix Dishwasher Error
- Disconnect power at circuit breaker.
- Remove lower access panel and toe kick panel.
- Take photos of all wire connections to main control board.
- Disconnect all wire harness connectors (label each one).
- Remove 4 mounting screws securing control board.
- Carefully remove old control board.
- Install new control board, ensuring proper orientation.
- Reconnect all wire harnesses exactly as documented – double-check each connection.
- Secure mounting screws to 8 inch-pounds.
- Reinstall panels.
- Restore power and enter service mode to initialize new board (press Heated Dry, Normal, Heated Dry, Normal).
- Run complete diagnostic cycle and clear any stored error codes.
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Recommended Replacement Part
Still Not Working?
If the replacement part didn’t fix the issue, you may have a wiring problem or main board failure.
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Expert: Mike Sullivan
EPA Section 608 Certified Technician with 18+ years experience.
Read Editorial Standards →Browse all Whirlpool error codes: Whirlpool Error Codes


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