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Source-backed error-code guide

Reviewed

LG Range F33 / F34 Error Code

F33/F34 point to temperature sensing for a front induction burner. They do not prove the sensor itself must be replaced, and induction electronics can retain dangerous energy, so homeowner work stays at the surface and normal controls.

Applies to LG induction range or cooktop

What the appliance detected

Detected condition

LG says F33 and F34 indicate a front induction burner temperature sensor error.

What may contribute

Possible causes

  • A temperature-sensing condition detected for a front induction cooking zone.
  • A temporary electronic condition that clears after LG’s supported reset.
  • A sensor, connection, induction module, wiring, or control-system issue requiring professional diagnosis if the code returns.

Start conservatively

Safe preliminary checks

Work in order and stop whenever a step is not supported by the documentation for your model.

  1. Stop cooking and let the surface cool

    • Turn the affected cooking zone off using normal controls and let the cooktop cool naturally.
    • Photograph F33 or F34 and record the exact model and which front zone was in use.

  2. Check only the cooking surface

    • Once cool, remove cookware and clean only the exterior glass surface using the model-approved care method.
    • Do not remove the cooktop, access underside electronics, or touch damaged glass.

  3. Use LG’s reset once

    • Turn the range circuit breaker off for 30 seconds and restore power once.
    • If F33 or F34 returns, stop using the affected zone and request service.

Actions not recommended

  • Do not open the cooktop, induction module, or electrical enclosures.
  • Do not test live voltage, temperature sensors, coils, inverter components, or control boards.
  • Do not continue using a cracked, scorched, or abnormally overheating cooktop surface.

When to stop and request service

  • Request appliance service if F33/F34 returns after one documented reset.
  • Stop using the affected zone for cracked glass, smoke, sparking, burning odor, or abnormal heat.
  • Use a qualified professional for any internal induction-module or sensor diagnosis.

Documented source

Official information reviewed

Our summary is based on manufacturer support material and stays within the limits of that material.

Source reviewed by Appliance Help HQ: September 23, 2026.

Appliance Help HQ is an independent informational site and is not affiliated with or endorsed by LG.

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