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Error code reference
LG Cooktop Error Code FF
Right cooling fan failure.
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What the FF error code actually means
Your LG cooktop has detected that the cooling fan on the right side of the unit has stopped working or is not working correctly. This fan is responsible for keeping the internal electronics cool during cooking. The cooktop may shut down or limit its function until the problem is resolved to prevent damage to internal parts.
Diagnostic procedure
The full FF procedure
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1
First diagnostic step
Check CN 003 on filter board (Right); test the fan motor per page 33.
More steps, wiring diagram references, and verified part numbers
Includes expected resistance and voltage values, connector pinouts, and supersession notes for replacement parts.
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Most common causes of FF
Ranked by how often they cause this code
- 1Failed fan motor
- 2Loose or damaged connector at CN 003
- 3Broken or shorted wire harness
- 4Fan blade obstruction or debris
- 5Right filter board not supplying voltage
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Questions people ask about FF
What does FF mean on a LG cooktop?
The FF error code on an LG cooktop signals a failure in the right cooling fan circuit. The cooktop's control system has detected that the right cooling fan is not functioning as expected. This fan keeps critical internal electronics cool during operation, and the error is triggered to prevent thermal damage to the inverter board and other components.
Is it safe to keep using my LG cooktop when the FF error is showing?
It is not safe to continue using the cooktop while the FF error is active. The cooling fan is responsible for preventing the internal electronics from overheating during operation. Running the cooktop without a functioning right cooling fan risks damaging the inverter board and other expensive internal components, and could create a fire hazard from excessive heat buildup.
How much does it cost to repair the FF error on an LG cooktop?
Repair costs depend on the root cause. If only a connector needs reseating or a wiring harness needs repair, costs can range from a minimal service call fee up to around $100 to $200 for labor. Replacing the cooling fan motor typically adds $50 to $150 in parts. If the right filter board has failed, board replacement can bring total repair costs into the $200 to $400 or higher range, depending on labor rates and parts availability.
Can I fix the FF error on my LG cooktop myself?
Some causes of the FF code, such as a loose connector at CN 003 on the right filter board or a debris-blocked fan blade, can be addressed by a knowledgeable DIYer comfortable working inside appliances. However, testing fan motor windings, checking board output voltage, or replacing the fan motor or filter board requires basic electrical testing skills and appropriate tools. If you are not comfortable working with appliance electronics, a qualified technician is recommended.
Will resetting the cooktop clear the FF error code?
A power reset, such as turning off the circuit breaker for 30 to 60 seconds, may temporarily clear the FF code, but it will return as soon as the cooktop detects that the right cooling fan is still not operating correctly. The underlying hardware fault, whether a failed motor, damaged harness, or bad connector at CN 003, must be diagnosed and repaired for the code to clear permanently.
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