GE Refrigerator Error Code 02

Error code 02 on a GE refrigerator indicates a refrigerator compartment temperature sensor fault. The sensor, typically a negative temperature coefficient (NTC) thermistor, continuously reports compartment temperature to the main control board. The control board monitors this signal and triggers error code 02 when the reported temperature falls outside the physically plausible range: above 150°F or below -58°F. Readings in these extreme ranges almost always point to an electrical or mechanical fault in the sensor circuit rather than an actual compartment temperature problem.

The most common causes are wiring and connection issues. A loose or missing sensor connector, corroded terminals, a pinched wire, a cut wire, or a short circuit in the wiring harness can all produce out-of-range voltage signals that the control board interprets as impossibly high or low temperatures. A short circuit typically drives the signal to one extreme, while an open circuit (disconnected connector or cut wire) drives it to the other. These conditions need to be ruled out before condemning the sensor itself.

If the wiring and connectors check out, the thermistor itself may have failed internally. A failed thermistor will present an incorrect resistance value outside its normal operating range, producing a signal the control board cannot interpret as a valid temperature. Resistance testing with a multimeter at the sensor terminals, compared against the expected values for the compartment temperature, can confirm sensor failure. Replacing a faulty sensor typically restores normal operation and clears the code.