Frigidaire Dishwasher Error Code i55

The i55 code means the DC Link voltage on the power control board has exceeded 392V DC, triggering an overvoltage protection fault. This DC Link is part of the inverter circuit that drives the wash and drain motors. The dishwasher shuts down to protect its internal electronics from damage. Diagnosis typically starts with inspecting the motor wire harness and connections to the control board.

No, the dishwasher should not be operated while the i55 fault is active. The error indicates a potentially dangerous overvoltage condition inside the control board. Continued operation could cause further damage to the board, motors, or wiring, and poses an electrical safety risk.

A power reset may temporarily clear the i55 code, but if the underlying cause has not been corrected, the fault will return as soon as the dishwasher attempts to run. Resetting without repairing is not a solution. The root cause, whether a motor, harness, or board issue, must be identified and addressed for the error to stay cleared.

Some causes of the i55 error are DIY-accessible, such as reseating loose connectors or replacing a damaged wire harness. However, testing motor windings and diagnosing a failed power control board typically require a multimeter and some comfort working with appliance electronics. If you are not confident working around high-voltage components, a qualified technician should perform the diagnosis.

Repair costs vary depending on the failed component. A replacement drain or wash motor typically ranges from $50 to $150 for the part, while a new power control board can cost anywhere from $80 to $250 or more. Adding professional labor will increase the total cost, generally placing a full repair in the $150 to $400 range depending on the component and service rates in your area.