Lg Microwave Error F5

⚡ Quick Answer: The lg microwave error F5 indicates a humidity sensor malfunction, preventing normal operation and heating. This issue may also produce unusual buzzin... ✅ DIY Fixable

What Does Error F5 Mean?

The lg microwave error F5 indicates a humidity sensor malfunction, preventing normal operation and heating. This issue may also produce unusual buzzing sounds. The error typically arises from an open or short circuit in the humidity sensor, wiring issues between the sensor and the main PCB, or a fault in the main control board. Resolving the F5 error requires identifying the specific cause to restore proper functionality.

Common Symptoms:

  • Microwave displays F5 and may not operate normally (heating disabled until issue resolved)
  • Code appears during or after operation indicating sensor detection fault

Possible Causes

  • Humidity sensor open or short (medium)
  • Wiring issue between humidity sensor and main PCB (medium)
  • Main control board fault affecting sensor circuit (low)

How to Fix Error F5

DIY Fix Basic power reset

  1. Unplug the microwave or turn off the circuit breaker for at least 60 seconds.
  2. Restore power and see if the F5 code returns.

Technician Only Inspect and repair humidity sensor circuit

  1. Disconnect power to the microwave before service.
  2. Inspect the humidity sensor connector and wiring harness for open circuits or shorts.
  3. Test the humidity sensor with appropriate diagnostic tools.
  4. Replace the humidity sensor if found defective.
  5. If wiring and sensor are good but error persists, test/replace the main control PCB.

Parts needed: Humidity sensor, Wiring harness, Main control PCB

🛑 When to Call a Pro:
  • If basic reset does not clear F5 and error recurs.
  • If you observe burning smell, smoke, or unusual noises.

Technical Specifications

wattage 1000W
component Magnetron
resistance 0.5-1.5 ohms
part_number LG EBR73708001
voltage_rating 120V AC

Common Questions

What does F5 error mean on lg microwave?

F5 indicates a humidity sensor malfunction, disabling heating and causing unusual sounds.

Can I fix lg microwave F5 error myself?

You can try a basic power reset by unplugging the microwave for 60 seconds.

How much does it cost to fix F5 error?

Repair costs range from ¥10,000 to ¥40,000+, depending on parts and labor.

When should I call a technician for F5?

Call a technician if the F5 error persists after a reset or if you notice burning smells or unusual noises.

Data last verified: 2026-01-10

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