LG Oven Error F3
⚡ Quick Answer: The LG oven F3 error code indicates a malfunction in the temperature sensor or a communication fault with the control panel. This typically results in... ✅ DIY Fixable
What Does Error F3 Mean?
The LG oven F3 error code indicates a malfunction in the temperature sensor or a communication fault with the control panel. This typically results in erratic temperature readings, improper heating, or an unresponsive control interface. If you see the F3 error, it may be due to a faulty temperature sensor, an open or shorted sensor circuit, or issues with the keypad or control board.
Common Symptoms:
- Oven displays F3 on control panel
- Oven fails to heat properly or at all
- Temperature readings appear incorrect or fluctuate
- Control panel may behave erratically or display non-responsive buttons
Possible Causes
- Faulty oven temperature sensor or open/shorted sensor circuit (medium)
- Keypad/control panel communication or short issue (medium)
How to Fix Error F3
DIY Fix Basic user troubleshooting for F3
- Turn off and unplug the oven or switch off circuit breaker for at least 30 seconds, then restore power to see if the F3 error clears.
- Clean the control panel gently with a soft dry cloth to remove any debris or residue that could trigger false keypad/communication faults.
- Check that the oven was not in self‑clean or unusual mode when the error appeared; reset and retry normal operation.
Technician Only Technician‑level diagnosis and repair for F3
- Disconnect power to the oven and access the internal oven temperature sensor (usually at the back wall of the cavity).
- Test the oven temperature sensor’s resistance with a multimeter at room temperature.
- Inspect wiring harness and connectors between the sensor and control board for damage, loose connections, or short circuits.
- If sensor and wiring are good, examine control board and keypad interface for signs of damage or abnormal readings; replace defective parts as needed.
Parts needed: Oven temperature sensor, Wiring harness/connectors, Control board or keypad assembly (if needed)
- Error code persists after basic reset and cleaning steps
- Sensor tests show out‑of‑spec resistance
- Wiring or control board shows physical damage or abnormal readings
Next step
Choose the next step for F3
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.
Main Control Board
The central brain of the appliance that controls all components, cycles, and timings.
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 | |
|---|---|
| component | Temperature Sensor |
| resistance | 1,000 - 2,500 ohms |
| part_number | LG 6323A20012A |
| voltage_rating | 120V AC |
Common Questions
What does F3 error mean on LG oven?
The F3 error indicates a malfunction in the temperature sensor or control panel communication, leading to improper heating.
Can I fix LG oven F3 error myself?
Yes, you can try basic troubleshooting like resetting the oven and cleaning the control panel.
How much does it cost to fix F3 error?
Repair costs for the F3 error range from $100 to $350, depending on parts and labor.
When should I call a technician for F3?
Call a technician if the error persists after resetting or if you notice physical damage to wiring or the control board.
Sources & References
Data last verified: 2026-07-26
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