LG Range Error Code F42 — Voltage Error
What this means
The F42 error code indicates the range has detected a voltage supply issue. Electric ranges and induction cooktops require a stable 240V supply. Voltage drops, surges, or an improperly wired circuit can trigger this error. Induction burners are particularly sensitive to voltage fluctuations.
Step-by-step fix
2 stepsReset the range
Turn off the circuit breaker for 30 seconds, then restore power.
Check the circuit breaker
Electric ranges require a 240V, 40-50 amp dedicated circuit with both breaker poles in the ON position. Make sure neither side of the double breaker has tripped.
If only one pole of the double breaker trips, the range may receive only 120V instead of 240V.
When to call a professional
If the voltage from the wall outlet is inconsistent, contact a licensed electrician to inspect the circuit. If the range's internal voltage regulation has failed, contact an appliance technician.
Related error codes
Information compiled from manufacturer service manuals, official troubleshooting documentation, and appliance repair industry resources. This guide is for informational purposes only — always consult a qualified technician for complex repairs.
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