LG Cooktop Error Code FA

The FA error code means the rear right cooking zone is sending no feedback signal to the main control board. LG induction cooktops rely on continuous communication between each IH module and the control board to operate safely. When that signal is absent, the board displays FA and disables the affected zone. The fault typically originates at the CN01 connector on the rear IH module or within the module itself.

The rear right cooking zone will not function while the FA code is active, so there is no heating risk from that specific zone. However, continuing to operate the cooktop with an unresolved module communication fault is not recommended, as underlying wiring or component issues could affect other zones or worsen over time. It is best to address the fault before resuming regular use.

Repair costs depend on which component has failed. If the fix is simply reseating the CN01 connector, the cost may be limited to a service call fee, typically in the range of $75 to $150. If the rear right IH module needs replacement, parts and labor combined can range from $200 to $450 or more depending on the specific model and your location. Main control board replacement is generally the most expensive scenario, often ranging from $300 to $600 or higher.

If you are comfortable working inside appliances safely, you can start by unplugging the cooktop and checking the CN01 connector on the rear IH module for loose seating, bent pins, or corrosion. Reseating or cleaning the connector is a straightforward step that sometimes resolves the error. However, if the fault is in the wiring harness or the IH module itself, those repairs involve higher-voltage components and are better handled by a qualified technician.

A power reset by unplugging the cooktop for a few minutes may temporarily clear the FA code, but it will return if the underlying cause has not been resolved. The error is not a soft fault triggered by a momentary glitch. It indicates a genuine absence of signal feedback from the rear right zone, so the root cause must be corrected for the code to stay cleared.