ERROR CODE EXPLAINED
LG Range / Wall Oven
LG Range / Wall Oven F21 Error Code
What it means
LG identifies F21 as a Steam Sensor Failure.
Try this first
- If the code reappears, turn the circuit breaker to the unit off for 30 seconds, then turn it back on.
- If the problem continues or the troubleshooting steps cannot be performed, request LG repair service.
Can I keep using it?⚠ LG identifies F21 as a Steam Sensor Failure.
Repair usually required?⚠ Follow only the manufacturer-backed checks listed below before replacing parts.
If the error keeps returning
Use the linked official manufacturer support article for model-specific details and service guidance.
Official source
Troubleshooting information verified against manufacturer support documentation.
View manufacturer support page →Safety note:ApplianceSignal provides general troubleshooting information. Always follow the appliance manufacturer's safety instructions and disconnect power when required.