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 diagn... ⚠️ 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

  1. Turn the oven off and disconnect power (unplug or switch off circuit breaker).
  2. Wait a few minutes, then restore power to see if the code clears.
  3. 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

  1. Disconnect oven power and access the internal oven cavity.
  2. Locate the temperature sensor (thermistor) on the back wall of the oven.
  3. Disconnect the sensor and measure resistance with a multimeter; compare to expected resistance for model.
  4. Inspect wiring harness for shorts or damage; repair or replace as needed.
  5. Install new temperature sensor if defective and test oven operation.

Parts needed: Oven temperature sensor (thermistor), Wiring harness/connectors

🛑 When to Call a Pro:
  • 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

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: 2026-01-10

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