GE Dishwasher Error Code E0

E0 means the control board has detected an open circuit in the tub thermistor, which is the temperature sensor that monitors water temperature during the wash cycle. The expected resistance of a functioning thermistor is approximately 56.5K ohms at 72°F. When the circuit is broken, the board cannot read any temperature data and shuts down the dishwasher. The fault points to either a failed sensor, a broken wire, or a bad connector in the thermistor circuit.

You should not attempt to bypass or ignore the E0 code and run the dishwasher. Without a functioning temperature sensor, the control board cannot properly regulate water heating, which could result in water that is not hot enough to clean and sanitize effectively or, in a fault scenario, overheating. The dishwasher is designed to stop operation when this error is detected for this reason.

Resetting the dishwasher may temporarily clear the displayed code, but the E0 fault will return as soon as the control board attempts to read the thermistor again and finds the open circuit still present. A reset does not repair a broken sensor, damaged wire, or corroded connector. The underlying cause must be diagnosed and corrected before the error will stay cleared.

A knowledgeable DIYer comfortable with a multimeter can diagnose this fault by checking thermistor resistance and inspecting the wiring harness and connectors. If the thermistor reads infinite resistance instead of approximately 56.5K ohms at room temperature, the sensor needs to be replaced. Reseating a loose connector requires no special tools and is a reasonable first step. If the wiring harness is damaged or the control board is involved, professional repair may be warranted.

If the repair only involves reseating a connector, there may be no parts cost at all. A replacement tub thermistor typically costs in the range of $15 to $50 for the part. If a professional technician is needed, total repair costs including labor generally fall in the range of $100 to $250 depending on location and service rates. A damaged wiring harness or control board would increase the cost significantly.