LG Refrigerator Error Code E 23

E 23 on an LG refrigerator, specifically RSG5B series models, indicates a condenser fan error. The condenser fan is not operating as expected, which can cause the refrigerator to lose cooling ability. The first step in diagnosing this error is checking the voltage at main PCB connector CN74 between the GRAY and YELLOW wires, which should measure between 7V and 12V.

Continuing to run the refrigerator with an active E 23 error is not recommended. Without a functioning condenser fan, heat cannot be properly dissipated from the condenser coils, which can cause the compressor to overheat and sustain permanent damage. Food safety may also be compromised if the unit loses its ability to maintain proper temperatures.

A reset may temporarily clear the E 23 error code from the display, but if the underlying cause such as a failed fan motor, wiring fault, or PCB issue has not been resolved, the code will return. Resetting the unit without addressing the root cause can delay repairs and risk further damage to the compressor due to continued heat buildup.

Some causes of E 23 are DIY-friendly, such as clearing debris or ice blocking the condenser fan blade. However, testing voltage at the main PCB connector CN74 and diagnosing whether the motor or control board has failed requires a multimeter and basic electrical knowledge. Replacing the condenser fan motor or main PCB is within reach for experienced DIYers, but those unfamiliar with appliance wiring should consult a technician.

Repair costs vary depending on the cause. A condenser fan motor replacement typically costs between $80 and $200 including the part and labor. If the main PCB is at fault, parts and labor costs can range from $200 to $450 or more depending on the specific board and service rates in your area. A simple wiring repair or clearing an obstruction may cost significantly less.