Dishwasher displays E9 and will not start; the control panel may be unresponsive or behave erratically.

Safety first: Turn off the power at the breaker before accessing the control panel.

• Power reset: Leave the dishwasher powered off for at least 5 minutes, then restore power to see if the error clears.
• Inspect the control board area: Remove the inner door panel to access the main control board. Check for signs of moisture, corrosion, or burnt components.
• Check harness connections: Ensure all connectors to the control board are fully seated and locked. Look for bent pins or loose plugs.
• Dry moisture: If condensation or a small leak has reached the control, dry the area thoroughly and address any door seal or vent leaks.
• Replace the control board: If E9 persists and there is visible board damage or no other faults found, replace the main control board with the correct Zline part. This is often best done by a professional.