F9
Cove
Control Board / Software Fault
Dishwasher displays F9 and may not respond to commands or may shut down unexpectedly.
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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
Corrupted control software, Power surge damage, Loose harness connection at control, Failed main control board
How to Fix / Troubleshooting
Safety First: Turn off power at the breaker before accessing any control components.
- Hard reset: Turn off the circuit breaker for at least 10 minutes to fully discharge the control. Restore power and attempt to run a cycle.
- Check power quality: Ensure the dishwasher is on a dedicated circuit and that there are no frequent breaker trips or flickering lights in the home.
- Do not open control housing: The control board contains high-voltage components. Do not attempt board-level repairs.
- When to call for service: Persistent F9 indicates a control board or firmware issue that requires replacement or reprogramming by an authorized technician.
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Repair Difficulty
Professional Required
5/5
Required Part
Main Control Board
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