Electrolux Dishwasher Error Code i66

The i66 code indicates Heating System Error 2, which points to a fault in the neutral relay circuit on the main PCB or a problem with the wiring harness and connectors connected to the heating system. The dishwasher will continue to run cycles normally, but heating performance is likely compromised. The error is only visible when the appliance is accessed through service mode, not during standard operation.

The appliance will continue to run cycles while this error is stored, but the heating system is not functioning correctly. Running the dishwasher in this state is unlikely to cause immediate safety risks, but dishes may not be washed or dried at the correct temperatures. Prolonged use with a stuck or burned relay could potentially worsen damage to the PCB, so prompt diagnosis is recommended.

A power reset may temporarily clear the stored fault code, but it will not resolve the underlying hardware issue causing the error. Because i66 is stored in service mode memory rather than displayed during normal operation, it may reappear the next time a technician accesses service diagnostics. The neutral relay or wiring fault must be physically corrected for the error to be fully resolved.

Some aspects of the diagnosis are accessible to a knowledgeable DIYer, such as inspecting connectors and wiring harnesses for visible damage or corrosion. However, testing and replacing the neutral relay on the PCB requires comfort with electronics and proper safety precautions. Full PCB replacement is a common repair path if relay-level repair is not feasible.

Repair costs depend on what component is at fault. Wiring harness or connector repairs typically fall in a lower cost range, while PCB replacement tends to be more expensive, generally ranging from around $150 to $400 or more depending on parts and labor in your area. Getting a diagnostic assessment from a qualified technician first will help clarify which repair is needed before committing to a cost.