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Error code reference

LG Cooktop Error Code FE

Left cooling fan failure.

LG codesLG cooktop codes

Left cooling fan failure.

First step from the service manual

Check CN 003 on filter board (Left); test the fan motor per page 33.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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What FE means on a LG cooktop

The FE error code on an LG cooktop indicates a left cooling fan failure. Cooling fans in induction and electric cooktops are critical components that prevent the power electronics and inverter boards from overheating during operation. When the control system detects that the left cooling fan is not running at the expected speed, or is drawing abnormal current, it triggers the FE code and typically shuts down the affected cooking zones to protect the internal components.

The first diagnostic step is to check connector CN 003 on the filter board for the left side of the unit. A loose, corroded, or damaged connector at this location can interrupt the control signal or power supply to the fan motor, causing a failure indication even when the fan motor itself is intact. After confirming the connector is secure and undamaged, the fan motor should be tested following the procedure outlined for that component, which covers checking for proper voltage supply and motor winding continuity.

Common root causes include a seized or worn fan motor, a wiring harness fault between the filter board and the motor, or a failed filter board that is not sending the correct drive signal to the fan. In some cases, debris or grease buildup can mechanically obstruct the fan blades, causing the motor to stall under load. Because the cooling fan protects high-value power components, this error should not be ignored or repeatedly bypassed by resetting the unit.

Source: manufacturer service documentation.

Common causes of FE

  1. 01

    Loose or damaged connector at CN 003

    Wiring / connection

    The connector CN 003 on the left filter board is the first place to inspect. A loose pin, corroded terminal, or cracked connector housing can cut power or signal to the fan motor and trigger the FE code without the motor itself being faulty.

  2. 02

    Failed fan motor

    Part replacement

    The fan motor windings can fail open or the motor bearings can seize over time, preventing the fan from spinning. Testing the motor per the diagnostic procedure will reveal whether it draws current and responds to its drive signal.

  3. 03

    Wiring harness fault

    Part replacement

    A break, short, or damaged insulation in the wiring between the filter board and the fan motor can interrupt operation. Inspect the harness routing for pinch points, heat damage, or chafed wire insulation.

  4. 04

    Mechanical obstruction of fan blades

    Wiring / connection

    Grease buildup, debris, or a foreign object lodged in the fan housing can stall the motor under load even if the motor is electrically sound. Visually inspect the fan assembly for any blockage.

  5. 05

    Failed filter board

    Part replacement

    If the filter board is not outputting the correct drive voltage or control signal to the left cooling fan, the motor will not run even though the motor and wiring are intact. This is typically diagnosed after ruling out the connector, wiring, and motor.

See the test procedure for each cause

Frequently asked questions about FE

What does FE mean on a LG cooktop?
The FE code on an LG cooktop indicates a left cooling fan failure. The cooktop's control system monitors the left internal cooling fan and triggers this code when the fan is not operating correctly. The cooling fan protects the power electronics from heat damage, so the unit will limit or suspend operation until the fault is corrected.
Can I fix the FE error on my LG cooktop myself?
Some causes of the FE error are approachable for a knowledgeable DIYer. Checking and reseating the CN 003 connector on the left filter board requires no special tools and no parts. Testing and replacing the fan motor or wiring is more involved and requires comfort working around appliance electronics. If you are unsure about working inside the cooktop, a qualified technician should perform the diagnosis and repair.
Is it safe to keep using my LG cooktop when the FE code is showing?
It is not safe to continue operating the cooktop while the FE code is active. The left cooling fan exists specifically to prevent the power electronics from overheating. Running the unit without a functioning cooling fan risks damaging the inverter board or other internal components, which can lead to more expensive repairs or create a safety hazard.
How much does it cost to repair a LG cooktop FE error?
Repair costs depend on which component has failed. If only the connector needs reseating, there is no parts cost and minimal labor. A replacement fan motor typically costs in the range of $25 to $80 for the part, while a filter board replacement can range from $60 to $180 or more. Professional labor charges will add to these figures depending on your location and service provider.
Will resetting my LG cooktop clear the FE error code?
Resetting the cooktop by cycling the power may temporarily clear the FE code, but the error will return as soon as the control system detects that the left cooling fan is still not functioning. A reset does not address the underlying fault. The connector, wiring, fan motor, and filter board need to be inspected and tested to resolve the error permanently.

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