GE Refrigerator Error Code 0

Error code 0 on a GE refrigerator appears as a fail result during the built-in thermistor/sensor system self-test. The main control board runs this diagnostic to verify that each thermistor in the system is returning resistance values within expected parameters. When the board receives a reading outside the acceptable range, or no signal at all, it logs code 0 to indicate the tested thermistor has failed. Technicians should begin by pulling resistance readings at the main control board connector and cross-referencing those values against the thermistor chart for the specific model.

For homeowners, a thermistor is a small temperature sensor that the refrigerator's control board uses to monitor conditions inside the fresh food and freezer compartments. When one of these sensors fails, the control board loses accurate temperature data and may not be able to regulate cooling properly. The refrigerator triggered this code because the sensor self-test it ran came back with a failure, meaning the thermistor itself is likely defective, has a damaged wire connection, or has developed an open or short circuit. Food safety can become a concern if the cooling system is not maintaining proper temperatures as a result.