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

  1. Unplug the microwave from the power outlet.
  2. Wait at least 60 seconds.
  3. Plug the microwave back in and power on to see if the F2 code clears.

Technician Only Inspect and Replace Thermistor / Temperature Sensor

  1. Disconnect power and discharge high-voltage capacitors.
  2. Access the interior to locate the thermistor/temperature sensor assembly.
  3. Test the thermistor resistance with a multimeter to verify out-of-range readings.
  4. Inspect wiring harness and connectors for damage or poor seating.
  5. Replace the thermistor and retest the microwave to confirm error resolution.

Parts needed: Thermistor/temperature sensor, Wiring harness/connectors (if damaged)

🛑 When to Call a Pro:
  • 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.

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

Data last verified: 2026-01-10

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