LG Refrigerator Error Code Error5

Error5 means the refrigerator's defrost system has failed to complete a defrost cycle. The code appears approximately 80 minutes after the control board detects the problem. The most likely causes are a burned-out defrost heater, a blown thermal fuse, or a disconnected wiring connector in the defrost circuit.

Continuing to use the refrigerator with Error5 active is not advisable for extended periods. Without a functioning defrost system, ice will build up on the evaporator coils, reducing cooling efficiency and eventually causing the unit to fail to maintain safe food storage temperatures. Address the error as soon as possible to prevent food spoilage.

Resetting the refrigerator by unplugging it may temporarily clear the Error5 code, but the code will return if the underlying defrost system fault is not repaired. Because the control board triggers the error 80 minutes after detecting the problem, the fault will be detected again during the next defrost cycle and the code will reappear. A reset is not a fix, only a temporary workaround.

A knowledgeable DIYer can diagnose and fix this error with basic tools. You will need a multimeter to test the defrost heater resistance and the thermal fuse for continuity, and you should inspect all connectors in the defrost circuit for damage or looseness. Replacing the defrost heater or thermal fuse is a moderate-difficulty repair that involves removing the freezer's evaporator panel.

Repair costs depend on which component has failed. A defrost heater or thermal fuse replacement typically ranges from $50 to $200 in parts and labor if you hire a technician. If only a connector needs to be reseated, there may be no parts cost at all. A professional diagnostic visit alone can range from $75 to $150 depending on your area.