GE Dishwasher Error Code Door Thermistor

This error indicates that the temperature sensor mounted in the door is producing a reading outside acceptable limits. An open circuit in the sensor circuit causes the control board to register a temperature below 32°F, while a short circuit causes it to register above 210°F. In both cases, the fault is electrical rather than a true temperature extreme. The dishwasher cannot operate normally without a functioning thermistor signal.

Running the dishwasher with an active thermistor fault is not recommended. The control board relies on thermistor data to manage wash temperatures and drying cycles, so performance will be compromised. In some cases the machine will refuse to start or complete a cycle. Resolving the fault before regular use is the better approach.

A reset may temporarily clear the fault code from the display, but the error will return if the underlying problem with the thermistor or its circuit has not been corrected. Resetting the control without repairing the faulty component is not a lasting solution. The correct approach is to test the thermistor resistance, inspect the wiring and connector, and replace any failed components before returning the machine to service.

A knowledgeable DIYer can diagnose this fault using a multimeter by checking thermistor resistance against the 1.7K ohm reference at 113°F. If the thermistor is out of range, replacing it is a moderate-difficulty repair that requires removing the door panel to access the sensor and its connector. If the wiring or connector is the issue, repair may be as simple as cleaning a corroded terminal or securing a loose plug.

If only the thermistor component requires replacement, parts typically fall in the range of $15 to $50 depending on the model. Professional labor to diagnose and replace the part can add $100 to $200 or more. If the control board is the root cause, board replacement costs significantly more, often in the $150 to $350 range for parts alone.