LG Refrigerator Error Code F1+F3

F1+F3 indicates a single motor damper failure. The refrigerator's control board attempted to drive the damper motor for 2 minutes but never received confirmation from the reed switch that the damper moved. This fault affects the airflow control between your freezer and fresh food sections.

The refrigerator may continue to run, but the damper failure means airflow between compartments is not being regulated correctly. This can result in one section being too warm or too cold, risking food safety. It is best to address the fault promptly and monitor temperatures in both the freezer and fresh food compartments in the meantime.

A reset may temporarily clear the code from the display, but it will return if the underlying cause has not been resolved. The control board will re-run the damper motor test and log the fault again within 2 minutes if the motor, reed switch, or driving IC is still defective. A reset is useful for confirming a repair was successful, but it is not a substitute for diagnosing and fixing the root cause.

Some causes are DIY-friendly. If ice has locked the damper in place, carefully defrosting the area around the damper assembly can resolve the issue. However, replacing a failed damper motor, reed switch, or a defective photo coupler on the control board typically requires component sourcing and moderate technical skill. If you are not comfortable working with appliance electronics, a qualified technician is recommended.

Repair costs vary depending on the failed component. A replacement damper motor assembly typically ranges from roughly $30 to $80 in parts. If the control board's photo coupler or the board itself needs replacement, parts costs can range from $80 to $200 or more. Adding professional labor, total repair costs generally fall between $100 and $350 depending on diagnosis complexity and your location.