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LG Oven Error Codes: F-Code Guide for LRE and LDE Series Ranges

Quick Answer

LG ovens display F-codes to identify specific faults. F9 means the door lock mechanism has failed, most commonly triggered during a self-clean cycle.

LG ovens display F-codes to identify specific faults. F9 means the door lock mechanism has failed, most commonly triggered during a self-clean cycle. F19 indicates the main control board (PCB) has failed. F3 points to a failed oven temperature sensor (RTD probe). F11 means a keypad key is stuck or shorted, often from a food spill. The 5b code indicates a display fault on some models.

LgOven

About These Lg Oven Error Codes

LG ranges use F-codes on the display when a fault is detected. This guide covers every code for the LRE and LDE series so you can identify the problem and choose the right repair path.

Most Common Error Codes

Door lock motor or switch failure40%
Main control board failure24%
Oven temperature sensor (RTD) open or shorted14%
Display board fault12%
Stuck or shorted keypad key from food spill10%

Symptoms You May Notice

  • Error code displayed on oven control panel
  • Oven will not heat
  • Oven door will not lock or unlock
  • Oven overheats or temperature is inaccurate
  • Keypad buttons do not respond

Tools Required for Diagnosis

MultimeterFlashlightPhillips head screwdriver

How to Identify Your Error Code

1

Note the exact code shown on the display

Note the exact code shown on the display. LG codes are case-sensitive: F9 and 5b are different codes. Write down exactly what appears.

2

Try a hard reset first

3

For F9 codes

4

For F3 or F11 codes

Frequently Asked Questions

How do I view the error history on my LG oven?
On LG ranges with an LCD display, press and hold the Settings or Clock button for 5 seconds to access the error history menu. This shows the last several fault codes stored by the control board. On older models without this menu, the error code only displays when the fault is actively present.
What does the 5b code mean on LG ovens?
The 5b code indicates a display board fault on some LG models. It is low-frequency (around 20 searches per month) compared to F9 or F3. A hard reset clears it in many cases. If it persists, the display board or its wiring to the main board needs inspection.
Can I use my LG oven while an error code is showing?
For F9, F19, and F3, do not use the oven. F9 means the door safety lock has failed (fire and safety risk during self-clean). F3 means temperature regulation is compromised. F11 with stuck keys may allow some cooking but the keypad will behave unpredictably. PF-type informational codes allow normal use.
Why do LG oven error codes appear after a power outage?
Power surges during outage restoration can damage the control board or corrupt its firmware state, causing fault codes to appear after power returns. A 60-second hard reset at the breaker resolves most post-outage codes. If codes persist after a reset, the control board may have taken surge damage.
Are LG freestanding range codes the same as LG wall oven codes?
Most F-codes are shared across LG freestanding ranges and built-in wall ovens. However, some oven-only models have slightly different code sets. F9 (door lock) is consistent across both product types. Always verify against your specific model number when ordering parts.

Related Lg Oven Error Codes

Code: F9LG Oven F9 Error Code: Door Lock Mechanism FaultCode: F19LG Oven F19 Error Code: Oven Control Board FaultCode: F3LG Oven F3 Error Code: Oven Temperature Sensor (RTD) FaultCode: F11LG Oven F11 Error Code: Stuck or Shorted Keypad Key

Same Fix Works on These Brands

Lg shares the same hardware platform with these brands. The diagnosis and repair steps are identical.

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Models Known to Experience HUB Errors

This repair applies to most Lg ovens with this error code. Common model numbers include:

LRE3061ST, LRE3194ST, LSIS3010SS, LDE4413ST

Last verified for technical accuracy on March 14, 2026