How to Fix / Troubleshooting

Safety first: Disconnect power before accessing control compartments.

Corrective steps:

Inspect communication cables: Locate the low-voltage harness between the Champion main board and any auxiliary modules. Reseat connectors and check for pin damage.
Check for moisture and corrosion: Ensure the control compartment is dry and free of condensation. Clean any corrosion on connectors.
Verify grounding: Confirm that the dishwasher is properly grounded and that no high-voltage cables are routed alongside communication lines without shielding.
Module substitution: If available, substitute a known-good auxiliary module to determine if the fault follows the module.
Replace main PCB if needed: If wiring and modules test good, the main control board may be defective.

When to call a technician: Communication faults often require specialized tools and parts; professional service is strongly recommended.

Internal communication error between main control board and auxiliary module; E19 displayed.

Possible Causes