LG Oven Error Code F-11

F-11 on an LG oven means the user interface (control panel) and the main PCB have lost communication for more than 10 seconds. The oven detects this signal dropout and shuts down to prevent unsafe operation. The first place to check is the CN10 connector, which links the two boards together.

A power reset will sometimes clear F-11 if the communication failure was caused by a temporary power fluctuation rather than a hardware fault. Turn off the oven at the circuit breaker or unplug it, wait at least 5 minutes, and restore power. If the error returns immediately or after a short period of use, there is an underlying wiring or component issue that needs to be addressed.

Repair costs vary depending on the root cause. If the fix is simply reseating the CN10 connector, there may be no parts cost at all. A replacement wiring harness typically runs in the range of $20 to $80 in parts. A new user interface board or main PCB can range from $100 to $300 or more depending on the model, plus labor costs if a technician is doing the repair.

In some cases, yes. Start by disconnecting power to the oven for several minutes and reconnecting it to see if the fault clears. If it returns, inspect the CN10 connector between the display and the main PCB for loose, corroded, or damaged pins and reseat the connection. If the wiring and connector appear intact, one of the two control boards may need to be replaced, which is a more advanced repair.

No, it is not safe to continue using the oven while F-11 is active. The error indicates that the control panel and main board are not communicating properly, which means the oven may not respond correctly to temperature or function commands. Disconnect power to the unit until the fault has been properly diagnosed and resolved.