GE Refrigerator Error Code R2 R3 R4 R5 (pattern 4)

This error pattern means the refrigerator's automatic defrost cycle ran for more than one hour without the defrost sensor reaching 10°C (50°F). The control board logs this fault to indicate that the defrost system failed to complete properly. The most likely causes include a blown thermal fuse, a failed heater drive relay, a defective defrost sensor, or a blocked drain.

Resetting the refrigerator may temporarily clear the displayed fault code, but it will not resolve the underlying problem. If the defrost heater, thermal fuse, relay, or sensor has failed, the next defrost cycle will again exceed the one-hour limit and the fault will return. The root cause must be diagnosed and repaired before the error will stay cleared.

Repair costs vary depending on which component has failed. Replacement parts such as a thermal fuse or defrost sensor are generally lower-cost items, typically in the range of $10 to $50 each for parts alone. A heater assembly or relay may run $30 to $100 or more for the part. Adding professional labor, total repair costs commonly fall in the range of $100 to $300, depending on the technician's rates and the number of components that need replacement.

Some steps, such as clearing a blocked defrost drain, are within reach for a capable DIYer. However, testing components like the FUSE-M for continuity, checking the heater drive relay, and verifying defrost sensor resistance requires a multimeter and basic knowledge of refrigerator wiring. Replacing the thermal fuse or heater assembly requires disconnecting the appliance from power and accessing the evaporator compartment, which many homeowners prefer to leave to a technician.

Operating the refrigerator with an active defrost fault will cause ice to accumulate progressively on the evaporator coils. Over time, this reduces airflow and cooling efficiency, which can lead to food spoilage. In some cases, the unit may stop cooling altogether. It is best to address the fault promptly rather than continuing to run the appliance in a faulted state.