F9
Haier
Configuration / Software Error
Dishwasher displays F9; unit may not start or may stop with no obvious mechanical issue.
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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 program memory, Incorrect configuration data, Power surge damage to control board, Loose user interface harness
How to Fix / Troubleshooting
Safety first: Disconnect power before removing control panels.
- 1. Hard reset: Turn off the breaker for 5–10 minutes, then restore power and attempt to start a cycle.
- 2. Check user interface connections: Remove the inner door panel and inspect the ribbon cable or harness between the user interface board and main PCB. Reseat connectors.
- 3. Inspect for damage: Look for burn marks or corrosion on the main control board.
- 4. Firmware update (if available): Some Haier models may support service firmware updates; this must be done by an authorized technician.
- 5. Replace control board: If F9 persists, replace the main control board with the correct Haier part.
Warning: Incorrect handling of control boards can cause further damage; use anti-static precautions.
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Repair Difficulty
Hard
4/5
Required Part
Main Control Board
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