LG Microwave Error F2
⚡ Quick Answer: The LG microwave error F2 indicates a malfunction in the thermistor, the internal temperature sensor that monitors heating conditions. This error is o... ⚠️ Difficulty Varies
What Does Error F2 Mean?
The LG microwave error F2 indicates a malfunction in the thermistor, the internal temperature sensor that monitors heating conditions. This error is often accompanied by unusual buzzing sounds or the microwave's failure to heat food. If the F2 code appears, it may signal a faulty thermistor or an issue with the wiring affecting the temperature circuit, leading to heating problems or a complete failure to start.
Common Symptoms:
- Microwave displays F2 on the control panel
- Unit may stop heating or refuse to start
- Error persists across power cycles or attempts to use normal functions
Possible Causes
- Faulty thermistor or temperature sensor (high)
- Loose or poor thermistor connection / wiring issue affecting temperature circuit (medium)
How to Fix Error F2
DIY Fix Power Cycle Microwave
- Unplug the microwave from the power outlet.
- Wait at least 60 seconds.
- Plug the microwave back in and power on to see if the F2 code clears.
Technician Only Inspect and Replace Thermistor / Temperature Sensor
- Disconnect power and discharge high-voltage capacitors.
- Access the interior to locate the thermistor/temperature sensor assembly.
- Test the thermistor resistance with a multimeter to verify out-of-range readings.
- Inspect wiring harness and connectors for damage or poor seating.
- Replace the thermistor and retest the microwave to confirm error resolution.
Parts needed: Thermistor/temperature sensor, Wiring harness/connectors (if damaged)
- If the F2 error persists after basic power cycling.
- If internal inspection reveals damaged wiring, connectors, or ambiguous sensor behavior.
- If you are not experienced with safe microwave high-voltage service procedures.
Next step
Choose the next step for F2
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
Thermistor
Measures precise temperature changes and sends resistance feedback to the control board.
- 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.
Temperature Sensor
Monitors the internal temperature to ensure correct operation and prevent overheating.
Wiring Harness
Connects controls, sensors, motors, and other electrical components inside the appliance.
Model-compatible Microwave 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.
Technical Specifications
| wattage | 1000W |
|---|---|
| component | Magnetron |
| resistance | 0.5-1.5 ohms |
| part_number | LG 2M246-00140 |
| voltage_rating | 120V AC |
Common Questions
What does F2 error mean on lg microwave?
F2 indicates a thermistor malfunction, causing heating issues or the microwave to stop working.
Can I fix lg microwave F2 error myself?
Yes, you can try power cycling the microwave by unplugging it for 60 seconds.
How much does it cost to fix F2 error?
Repair costs range from $30–$150 for parts, and $100–$250+ for professional service.
When should I call a technician for F2?
Call a technician if the error persists after power cycling or if there are signs of damaged wiring.
Sources & References
- LG Microwave - Error Codes | LG USA Support (official)
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!