Fd
Cove Communication / Data Bus Fault

Dishwasher displays Fd and may not communicate with connected features or internal modules.

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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 harness between control and user interface, Damaged communication cable, Faulty user interface board, Main control communication failure

How to Fix / Troubleshooting

Safety First: Turn off power at the breaker before accessing the door or toe-kick panels.

  • Hard reset: Turn off the breaker for 10 minutes to fully reset all electronics, then restore power.
  • Check for moisture: Excess steam or leaks into the door can affect connectors. If you see condensation inside the control area, leave the unit powered off and contact service.
  • Do not reseat connectors while powered: Never unplug or plug harnesses with power applied.
  • When to call for service: Fd generally requires a technician to inspect harnesses and replace the faulty board (UI or main control).
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Repair Difficulty

Professional Required 5/5

Required Part

User Interface Board
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