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F6

LG Oven

Severity: Critical

Source: OnlyErrorCodes.com — Every error code. One place.

LG Oven F6 Error — Control Board Fault Fix Guide

What Does This Error Mean?

F6 indicates a control board fault — the main electronics have detected an internal error.
Power-cycle once to confirm.
If F6 returns, the board needs replacement.
This is the most expensive common LG oven repair (300–500 USD parts plus labor).
For older ovens, replacement of the entire range may be more economical.

Affected Models

  • LG LRE series electric range
  • LG LSE series slide-in
  • LG wall oven
  • LG ProBake convection range

Common Causes

  • Control board failed (most common)
  • Power surge damaged the processor or memory
  • Moisture damage from steam exposure
  • Capacitor on the board aged out
  • Component on the board (relay, MOSFET) failed

How to Fix It

  1. Power-cycle the oven.

    Switch the breaker off for 30 minutes.
    This long off period lets capacitors fully discharge.
    Switch back on.
    Watch the display.
    If F6 doesn't return, monitor for recurrence over the next several uses.

  2. Try a low-temperature bake.

    Set the oven to 250°F.
    Watch the display.
    If F6 returns within minutes, the board is failing under any load.
    If it doesn't return, the issue may be intermittent — note when it appears (heating, cooling, idle?).

  3. Don't open the oven yourself.

    The control board is behind the front trim panel near the controls.
    It's connected to high-voltage power, the heating elements, and multiple sensors.
    Service-tech-only work.
    DIY risks shock or damage.

  4. Decide repair vs replace.

    Built-in or wall oven under 7 years: repair the board (300–500 USD).
    Slide-in or freestanding range over 10 years: replacement (700–1500 USD new) is often more cost-effective.
    Get the service quote first to compare against new range pricing.

  5. Schedule LG service if repairing.

    Provide model and serial numbers.
    Most LG-authorized centers can replace the control board in one visit.
    Free under warranty.
    Out of warranty, expect 300–500 USD all-in.
    Don't keep cycling the oven hoping F6 clears — repeated failures stress other components.

Frequently Asked Questions

Can a power surge cause F6?

Yes — surges damage processor or memory chips on the control board.
If F6 appeared right after a thunderstorm or power outage, surge damage is the likely cause.
A small surge protector at the oven's outlet (or inline at the breaker) prevents recurrence — 20–50 USD insurance.

Is the oven safe to use with F6?

No — don't keep using it.
F6 is the controller saying it can't trust itself.
Continued use risks erratic heating (overheating one zone, cold zones in another) which can damage food and the oven itself.
Wait for service before resuming use.