Step-by-Step DIY Fix Guide
- SAFETY: Turn off the oven immediately. If F2 occurs during self-clean, the self-clean cycle will be cancelled automatically. Wait for the oven to cool completely (at least 1 hour) before accessing any components.
- Disconnect power at the circuit breaker for 60 seconds, then restore power and test.
- If F2 appeared during a normal bake cycle (not self-clean), locate the temperature sensor and test its resistance with a multimeter. A shorted sensor reads significantly below 1080 ohms at room temperature.
- If the sensor tests good (approx. 1080–1090 ohms at 70°F), the control board relay may be sticking — call a technician.
If the warning comes back after restart
- If the warning returns immediately after a clean restart, the sensor or wiring path becomes more likely than a one-time glitch.
- F2 appears during a normal bake cycle (not self-clean) and the sensor reads within specification
- F2 returns immediately after a power reset
What This Error Means
Error F2 on your LG oven means: The upper oven temperature sensor has detected a temperature that is dangerously high, or the sensor is reading a shorted condition that makes the oven's control board believe the temperature is above a safe threshold. The range's self-diagnostic system has detected this condition.
The most frequent cause is oven thermistor shorted — resistance is too low, making the board read an abnormally high temperature. Work through the causes and fix steps below in order — many LG oven errors are resolved without a service call.
Many cases of F2 can be resolved by the homeowner. The steps below cover the full DIY checks — if they do not resolve the error, a technician is needed.
Oven temperature sensor faults are among the most common LG oven errors. The sensor is a simple probe on the back wall of the oven cavity — reconnecting a loose harness connector resolves around half of all sensor fault codes. Sensor replacement is a 15-minute DIY repair when the connector check does not resolve it.
Most Likely Cause by Symptom
The LG oven may stop, pause, or refuse to complete the cycle normally.
Likely cause: Oven thermistor shorted — resistance is too low, making the board read an abnormally high temperature
Check first: SAFETY: Turn off the oven immediately. If F2 occurs during self-clean, the self-clean cycle will be cancelled automatically. Wait for the oven to cool completely (at least 1 hour) before accessing any components.
The warning may return immediately because the appliance is detecting an internal fault.
Likely cause: Actual oven overtemperature during a self-clean cycle — self-clean runs at 800–900°F and can trigger F2 if the oven runs longer than expected
Check first: Disconnect power at the circuit breaker for 60 seconds, then restore power and test.
Common Causes
- Oven thermistor shorted — resistance is too low, making the board read an abnormally high temperature
- Actual oven overtemperature during a self-clean cycle — self-clean runs at 800–900°F and can trigger F2 if the oven runs longer than expected
- Faulty oven control board sending too much power to the bake or broil element
What Not to Do
- Do not attempt to restart the oven immediately after F2 — allow at least 1 hour for the oven to cool before investigating
Model and Display Variation Notes
Model-family notes
- LG oven display wording and code formats can vary by series.
- If your model behaves differently, check the owner manual before trying any deeper maintenance step.
Display and panel differences
- Panel wording can vary by series, so confirm the exact code pattern before buying parts.
Parts, Tools and Service Options
Service option
LG service visit if the warning returns after the basic checks are complete.
Manual and model check
Check your exact model and manual before ordering any LG oven parts.
Common parts
- Oven temperature sensor/thermistor if sensor is shorted ($15–$40)
- Main control board if board relay is sticking ($100–$250)
This section stays service-first because the page points more strongly toward support or professional repair than a routine parts purchase.
When Not to Keep Troubleshooting
F2 appears during a normal bake cycle (not self-clean) and the sensor reads within specification
- F2 returns immediately after a power reset
How to Prevent It Recurring
- Do not run consecutive self-clean cycles without allowing the oven to cool fully to room temperature between them — heat stress accelerates sensor failure
Related Error Codes
F1
The upper oven temperature sensor (thermistor) is reading an open circuit — its resistance is outside the valid range, meaning the oven cannot monitor temperature in the upper cavity.
F5
The lower oven temperature sensor is reading a shorted condition or the lower oven cavity has exceeded a safe operating temperature.
F6
The upper oven is not reaching the set temperature within the expected time. The bake or broil heating element or its control circuit has failed.
Extra notes
- This page is based on LG support material and stays conservative where model-specific guidance may vary.
- The goal is to help you identify safe first checks before you move into parts, service, or model-specific manual lookup.
Source and model notes
Last reviewed: 2026-04-08
Based on: Based on LG support material and edited into consumer-safe guidance for the exact code family on this page.
Model coverage note: LG oven code meanings can vary by series, control panel, and model family, so use this page as a safe starting point rather than a replacement for the model-specific manual.
Important: FixThisError is an independent guide, not the manufacturer. Use your model-specific manual when the panel wording or behavior differs.
Always disconnect power before inspecting appliances. If unsure, contact a licensed appliance technician.