GE Refrigerator Error Code R2

The R2 error code on a GE refrigerator indicates that the refrigerator compartment temperature sensor has experienced either an open circuit or a short circuit condition. This sensor is a thermistor, a resistive component whose electrical resistance changes predictably with temperature. The control board continuously monitors the thermistor's resistance to determine the actual temperature inside the refrigerator compartment. When the board detects resistance values that fall outside the expected range, either infinitely high (open circuit) or near zero (short circuit), it triggers the R2 fault code and flags the sensor circuit as failed.

An open circuit in the sensor circuit typically means the thermistor itself has burned out internally, or that a wiring connection somewhere between the sensor and the control board has broken or corroded. A short circuit condition points to damaged wiring insulation where two conductors are making unintended contact, or a thermistor that has failed in a shorted state. Either failure mode prevents the control board from getting accurate temperature data, which can cause the refrigerator to run continuously, stop cooling properly, or behave erratically.

The first diagnostic step is a thorough inspection of the sensor and its associated wiring harness. Check all connectors for corrosion, bent pins, or loose connections. If the wiring checks out, the thermistor itself should be tested with a multimeter to confirm whether its resistance matches the expected value for the current ambient temperature. A failed thermistor or damaged wiring harness will need to be replaced to clear the fault.