LG Cooktop Error Code F2

The F2 code on an LG induction cooktop indicates a fault with the heat sink thermistor in the front left inverter IH module. The thermistor monitors temperature inside the induction electronics, and when its signal falls outside the expected range, the cooktop disables the front left zone and displays F2. The first step in diagnosing this error is checking connector CN02 on the front IH module for a loose or damaged connection.

When F2 is active, the cooktop disables the front left cooking zone as a protective measure, meaning that zone will not operate. While the remaining zones may still function, it is not advisable to continue using the appliance with an active fault code. The thermistor failure removes a key thermal protection safeguard, and continued use without repair could risk damage to the inverter module components.

Repair costs vary depending on what component has failed. If only the connector needs reseating or cleaning, the cost may be limited to a service call fee, typically in the range of $75 to $150. If the thermistor or the front IH inverter module requires replacement, parts and labor combined can range from $150 to $400 or more depending on parts availability and local labor rates.

A knowledgeable DIYer can attempt to resolve F2 by carefully inspecting and reseating connector CN02 on the front IH module, since a loose connection is the most common cause. However, if the thermistor, wiring harness, or inverter module needs replacement, the repair involves working near high-voltage induction components, which carries a significant safety risk. It is strongly recommended to have a qualified appliance technician perform any repairs beyond the initial connector inspection.

Powering the cooktop off and back on may temporarily clear the F2 display, but the error will return if the underlying fault with the thermistor circuit is still present. A reset does not repair a failed thermistor, damaged wiring, or a faulty connector. The code will continue to appear until the root cause is diagnosed and corrected.