GE Dishwasher Error Code Super Wash LED flashing

The Super Wash LED flashing indicates an over temperature fault, meaning the dishwasher's control system has detected water temperature exceeding 176°F, with a fault threshold of approximately 180°F. The warning is generated by the power control board based on input from the thermistor. The dishwasher will continue running its cycle, but the flashing LED signals that the temperature condition needs to be investigated. The two primary components to inspect are the thermistor and the PCB.

The dishwasher is designed to continue its wash cycle even when this fault is active, so it does not immediately shut down. However, running the appliance while a genuine overheating condition exists could indicate a heating element or relay problem that should not be ignored long term. It is advisable to investigate the cause promptly, particularly if you suspect the heating element is not cycling off correctly.

Repair costs depend on which component is at fault. A replacement thermistor is generally an inexpensive part, with total repair costs including labor typically ranging from around $75 to $200. If the power control board requires replacement, costs can range from approximately $150 to $400 or more depending on labor rates and part pricing in your area. Getting a diagnostic inspection first will help narrow down which component actually needs to be replaced.

Start by checking the thermistor for accurate resistance readings at a known water temperature to confirm whether it is reporting correctly. If the thermistor tests within spec, inspect the power control board for signs of relay failure or visible damage. Also verify that your home's water heater is not set above the recommended supply temperature, and check the wiring harness between the thermistor and PCB for corrosion or loose connections. Replacing the faulty component, either the thermistor or the PCB, is typically required to resolve the fault.

A reset may temporarily clear the fault indication, but if the underlying cause, such as a failed thermistor, a PCB fault, or a heating element that is not cycling off, has not been corrected, the Super Wash LED will begin flashing again once the conditions that triggered it are repeated. Resetting without diagnosis and repair is not a long-term solution.