Safety first: Turn off power at the breaker before removing any control panels.

1. Power reset: Switch off the dishwasher at the breaker for at least 5 minutes to allow the control to fully discharge. Restore power and see if the error clears.
2. Inspect control connections: Remove the inner door panel to access the main control board. Check all harness connectors for secure fit and signs of heat damage.
3. Check for moisture: Look for condensation or water ingress around the control area. Dry thoroughly and correct any door seal issues that may allow steam to reach the electronics.
4. Surge protection: If the error appeared after a storm or outage, consider that the board may have been damaged by a surge.
5. Replace control board: If E9 persists after reset and inspection, replace the Haier main control board with the correct part number for your model.

Warning: Handle electronic boards with care to avoid static discharge damage.

Dishwasher shows E9; unit may not start or may stop unexpectedly, sometimes with no obvious mechanical issue.

Possible Causes