LG Microwave Error Code E-11

E-11 is a sensor open error indicating that the LG microwave's smart board cannot detect a signal from the gas sensor. This means the circuit between the sensor and the board is broken or missing. The cause is typically a disconnected sensor plug, damaged wiring, a failed sensor, or in some cases a faulty smart board.

A reset will not permanently clear E-11 if the underlying cause has not been addressed. The error will return as soon as the sensor cook function is used again because the control board will still detect the open circuit condition. The sensor connection, wiring, and components need to be diagnosed and repaired for the error to go away.

If the fix is simply reseating a disconnected connector, the cost may be minimal or limited to a service call fee. A replacement gas sensor typically falls in the range of $20 to $60 for the part, while a smart board replacement can range from $80 to $200 or more depending on the model, plus labor if a technician performs the repair.

If the error is caused by a disconnected sensor connector, a knowledgeable DIYer can often reseat the plug after accessing the sensor compartment. Wiring inspection and sensor replacement are also manageable repairs if you are comfortable working inside the appliance with the power disconnected. Smart board replacement is more involved and may be better suited to a qualified technician.

The E-11 error disables the automatic sensor cooking functions, so those modes should not be relied upon while the fault is present. Basic timed cooking may still operate, but using the microwave with a known sensor circuit fault is not recommended as a long-term practice. It is best to diagnose and repair the issue before continuing regular use.