GE Dishwasher Error Code NORM flashes

NORM flashing on a GE dishwasher signals a thermistor fault. This means the main control board has detected that the water temperature sensor has stopped responding correctly, or that the water temperature has exceeded 175°F. The dishwasher will continue running the cycle rather than stopping, but the temperature is no longer being accurately managed. Diagnostic attention is needed to determine whether the thermistor, wiring, or control board is at fault.

The dishwasher will continue to complete cycles when NORM is flashing, but it is operating without reliable temperature monitoring. If the fault is caused by an over-temperature condition rather than just a bad sensor, continued use could stress internal components or affect wash quality. It is best to diagnose and resolve the fault before relying on the appliance for regular use.

Resetting the dishwasher may temporarily clear the displayed fault, but if the underlying issue with the thermistor, wiring, or control board has not been corrected, the code will return. A reset is useful for confirming whether the fault is intermittent or persistent, but it does not substitute for proper diagnosis and repair of the root cause.

A knowledgeable DIYer can handle several steps: inspecting and reseating the thermistor wiring connector, checking the harness for visible damage, and testing the thermistor's resistance with a multimeter. If the thermistor is confirmed faulty, replacing it is a moderately accessible repair. However, if the main control board is the root cause, replacement requires more comfort with appliance electronics and should be considered carefully before purchasing parts.

Repair cost depends on the failed component. A replacement thermistor is typically an inexpensive part, often in the range of $15 to $40. A main control board is significantly more costly, generally ranging from $100 to $250 or more depending on the model. Adding professional labor, total repair costs can range from $80 to $350 depending on the diagnosis.