What F33, F34 (Front Induction Burner Temperature Sensor Error) Means
F33 and F34 both indicate a Front Induction Burner Temperature Sensor Error on LG induction range and cooktop models, per LG's range Help Library article, which documents this scheme across its Electric Range, Radiant Cooktop, and Gas Range tabs together, which documents them as two separate codes with the identical description.
Common Causes of F33, F34 (Front Induction Burner Temperature Sensor Error)
- Induction burner temperature sensor has failed or lost contact
- Wiring fault to the sensor
🔧 One Safe Check You Can Try
Turn the circuit breaker for the range off, wait 30 seconds, and turn it back on.
⚠ Why You Shouldn't Go Further Than That
- If a breaker cycle doesn't clear a repeat F33 or F34, the sensor is built into the cooktop's glass-ceramic surface assembly and needs a technician to access and replace - it isn't a surface-level part.
- Avoid using the front-left induction zone for cooking that needs consistent temperature control until this is resolved, since the fault means the zone can't reliably confirm the pan's actual temperature.
Opening a panel to inspect or repair something yourself doesn't automatically cancel your manufacturer's warranty — but it can risk accidental damage, and some manufacturers do have specific service conditions. Check your product's warranty terms, or ask us, before deciding.