LG Oven Error F4
⚡ Quick Answer: The LG oven F4 error code indicates a malfunction in the temperature sensor, specifically a shorted thermistor detected by the oven’s internal diagnos... ⚠️ Difficulty Varies
What Does Error F4 Mean?
The LG oven F4 error code indicates a malfunction in the temperature sensor, specifically a shorted thermistor detected by the oven’s internal diagnostics. This issue can lead to erratic temperature readings, causing the oven to stop heating, overheat, or shut down unexpectedly. It may occur at startup or during the heating cycle, impacting cooking performance. Common causes include a defective temperature sensor or wiring issues between the sensor and control board.
Common Symptoms:
- Oven stops heating when the code appears
- Error displayed at startup or during heating cycle
- Oven may overheat or shut down unexpectedly when F4 is present
Possible Causes
- Shorted or defective oven temperature sensor (thermistor) (medium)
- Wiring issue between temperature sensor and control board (medium)
How to Fix Error F4
DIY Fix Inspect and reset oven
- Turn the oven off and disconnect power (unplug or switch off circuit breaker).
- Wait a few minutes, then restore power to see if the code clears.
- If the error persists, note if the oven has recently been exposed to steam or moisture, which may affect the sensor connector.
Technician Only Test and replace temperature sensor
- Disconnect oven power and access the internal oven cavity.
- Locate the temperature sensor (thermistor) on the back wall of the oven.
- Disconnect the sensor and measure resistance with a multimeter; compare to expected resistance for model.
- Inspect wiring harness for shorts or damage; repair or replace as needed.
- Install new temperature sensor if defective and test oven operation.
Parts needed: Oven temperature sensor (thermistor), Wiring harness/connectors
- If you are uncomfortable working with electrical components inside the oven
- If replacing the temperature sensor and wiring does not clear the error
- If there are signs of control board damage or other concurrent faults
Next step
Choose the next step for F4
Confirm the diagnosis before ordering. An error code can identify the system involved, but it does not prove that a specific part has failed.
Most relevant component to inspect
Temperature Sensor
Monitors the internal temperature to ensure correct operation and prevent overheating.
- Typical part-only price
- $15 - $35
- DIY difficulty
- Easy
- Estimated time
- 15-30 mins
Where can I find the model number?
Check the rating label around the door, lid, frame, rear panel, or inside the appliance cabinet. Use the complete model number, including suffixes.
Verify the complete model and part number on the retailer's compatibility page before ordering.
Other parts options
Check related components first; use model search as a fallback.
Wiring Harness
Connects controls, sensors, motors, and other electrical components inside the appliance.
Model-compatible Oven parts
Enter the complete model number to browse compatible replacement parts. This is a model-based parts search, not a diagnosis that a specific component failed.
Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. We may earn a commission from other qualifying purchases or service requests made through links on this page, at no additional cost to you. Recommendations are based on repair relevance, not commission rate.
Optional routine care
Maintenance supplies
These products support cleaning or routine upkeep. They are separate from the possible repair components above and are not claimed to fix this error code or symptom.
Non-Scratch Cooktop Cleaner
A routine surface-care product. Confirm that it is approved for the specific glass, ceramic, enamel, or stainless finish.
Oven Thermometer
A diagnostic aid for comparing cavity temperature during a controlled check. It does not prove which internal component has failed.
Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. Recommendations are based on routine-care relevance, not commission rate.
Technical Specifications
| wattage | N/A |
|---|---|
| component | Temperature Sensor |
| resistance | 10K ohms at 25°C |
| part_number | LG 6323B61000C |
| voltage_rating | 120V AC |
Common Questions
What does F4 error mean on LG oven?
The F4 error means there's a malfunction with the temperature sensor, affecting heating and cooking performance.
Can I fix LG oven F4 error myself?
Yes, you can inspect and reset the oven, but if the error persists, further technical action may be needed.
How much does it cost to fix F4 error?
Repairing the F4 error typically costs between ¥3,000 to ¥10,000 for parts, depending on the model and region.
When should I call a technician for F4?
Call a technician if you're uncomfortable with electrical components or if replacing the sensor doesn't resolve the error.
Data last verified: 2026-07-26
User Comments (0)
Share your experience or solution below.
Please login to post a comment.
Be the first to comment!