LG Microwave Error Code F-2

The F-2 code on an LG microwave indicates a shorted or faulty connection at the CN3 connector, and it is triggered during toaster operation. Specifically, it means two wire leads at that connector are in contact with each other when they should be separated. The appliance shuts down the toaster function to prevent electrical damage. Inspecting and separating those wire leads is the first step toward resolving this fault.

No, you should not attempt to use the appliance while the F-2 fault is active. The error indicates a wiring short in the toaster circuit, which poses a risk of further electrical damage or potentially a fire hazard if the condition is not corrected. Keep the microwave unplugged until the CN3 connector and associated wiring have been inspected and the fault is cleared.

If the fix only requires separating and re-routing the wire leads at the CN3 connector with no parts needed, a repair technician visit could range from around $75 to $150 for labor depending on your area. If the wiring harness or connector needs to be replaced, parts and labor combined could run between $100 and $250. The overall cost depends on whether additional damage to the wiring or control board is found during inspection.

If the cause is simply two wire leads that have shifted and are touching at the CN3 connector, separating them and re-routing the wiring may resolve the issue without replacing any parts. However, if the wires have damaged insulation or the connector housing is broken, those components will need to be replaced. Because microwaves contain high-voltage capacitors that can retain a dangerous charge even when unplugged, internal repairs should only be performed by someone familiar with high-voltage appliance safety procedures.

Simply resetting or power-cycling the microwave is unlikely to permanently clear the F-2 code if the underlying short at the CN3 connector has not been corrected. The fault will typically return as soon as the toaster function is activated again. The wiring issue must be physically resolved before the error will stay cleared.