GE Refrigerator Error Code 0003

Code 0003 means the control board detected that the freezer thermistor is sending a reading outside its acceptable resistance range. The thermistor is the temperature sensor for the freezer compartment. The cause is typically a failed thermistor, a wiring problem, or in some cases heavy frost buildup around the sensor.

Short-term use is possible, but the refrigerator cannot accurately regulate freezer temperature without a functioning thermistor. This means the freezer could run too warm, risking food safety, or too cold, causing excess frost. Do not store items that require strict temperature control, such as breast milk, medications, or raw meat, until the code is resolved. Address the issue within a day or two to avoid food loss.

Unplug the refrigerator, then locate and disconnect the freezer thermistor connector. Set a multimeter to measure resistance (ohms) and probe the two thermistor terminals. Compare the reading to your model's service data, which is often found on a wiring diagram inside the refrigerator or in the service manual. A reading of infinite resistance means the thermistor is open and must be replaced. A reading of zero or near-zero ohms means it is shorted. A reading within spec points the diagnosis toward the wiring harness or control board.

Start by unplugging the refrigerator and locating the freezer thermistor, which is usually clipped to the evaporator cover or a fin inside the freezer. Check the connector at the thermistor for damage or corrosion, then use a multimeter to test the thermistor's resistance and compare it to the spec in your model's service manual. A thermistor at room temperature typically reads around 5,000-16,000 ohms depending on the model. If the reading is open, shorted, or far outside spec, replace the thermistor. If the wiring and thermistor both test good, the control board may need replacement.

A replacement freezer thermistor for a GE refrigerator typically costs between $10 and $30 for the part and is a relatively simple DIY repair requiring only a screwdriver and a multimeter. If a technician is needed, expect $100 to $200 total including labor. If the control board turns out to be the failed component, parts alone can range from $80 to $250 depending on the model, and professional installation will add to that cost.