LG Oven Error F23
⚡ Quick Answer: The LG oven error F23 indicates a malfunction in the oven temperature sensor, which can lead to incorrect temperature readings and inconsistent cookin... ✅ DIY Fixable
What Does Error F23 Mean?
The LG oven error F23 indicates a malfunction in the oven temperature sensor, which can lead to incorrect temperature readings and inconsistent cooking results. This error may cause the oven to not heat properly or shut off unexpectedly, often appearing during startup or preheating. Possible causes include a faulty temperature sensor circuit, loose wiring connections, or issues with the control panel. Immediate attention to these components is necessary for proper oven functionality.
Common Symptoms:
- Oven displays F23 and may not heat properly or shut off
- Oven may not reach or maintain set temperature
- Error appears shortly after start or during preheat
Possible Causes
- Oven temperature sensor (thermistor) circuit fault (medium)
- Loose or damaged wiring/connector between oven sensor and control board (medium)
- Control panel/touch controller issue affecting error display (low)
How to Fix Error F23
DIY Fix Power Reset the Oven
- Turn off and unplug the oven or switch off its breaker.
- Wait 5–10 minutes to allow the control board to fully reset.
- Restore power and attempt to run the oven again.
DIY Fix Check for Loose Sensor Wiring
- Disconnect power at the breaker.
- Access the back panel to locate the oven temperature sensor wiring.
- Ensure connectors are firmly seated and wiring shows no visible damage.
Technician Only Test and Replace Oven Temperature Sensor
- Disconnect power and locate the oven temperature sensor.
- Measure sensor resistance at room temperature.
- Replace sensor if resistance is significantly outside expected range or intermittent.
Parts needed: oven temperature sensor (thermistor)
Technician Only Inspect and Repair Control Board/Touch Interface
- Disconnect all power.
- Inspect control panel PCB and touch interface for signs of damage, corrosion, or faulty components.
- Repair or replace the affected control board or touch sensor assembly.
Parts needed: display/touch control board or UI assembly
- If the error persists after basic power reset
- If you are not experienced with internal wiring and sensor testing
- If visual inspection shows damaged boards or components
Next step
Choose the next step for F23
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.
User Interface Board
Receives button or touch input and controls the appliance display and indicators.
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.
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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
| note | The previous model-independent part specification was removed. Verify the full model number and diagnosis in the manufacturer's official parts catalog before ordering. |
|---|---|
| part_number | None |
Common Questions
What does F23 error mean on LG oven?
F23 indicates a malfunction in the oven temperature sensor, causing erratic heating.
Can I fix LG oven F23 error myself?
Yes, you can perform a power reset and check for loose sensor wiring.
How much does it cost to fix F23 error?
Repair costs range from $30 to $120 depending on the required parts.
When should I call a technician for F23?
Call a technician if the error persists after a reset or if you're not comfortable with wiring.
Data last verified: 2026-07-31
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