Lg Refrigerator Error RT

⚡ Quick Answer: The LG refrigerator RT error code indicates a malfunction with the room temperature sensor, which can lead to abnormal temperature readings and incons... ✅ DIY Fixable

What Does Error RT Mean?

The LG refrigerator RT error code indicates a malfunction with the room temperature sensor, which can lead to abnormal temperature readings and inconsistent cooling. If this error appears, your refrigerator may not cool properly or could display unstable temperature readings. It's essential to address this issue promptly to avoid food spoilage.

Common Symptoms:

  • Temperature display shows unstable or unusually high readings
  • Cooling operation may stop or be inconsistent
  • Error code “RT” appears on display panel

Possible Causes

  • Temperature sensor (room/RT sensor) fault or abnormal reading (medium)

How to Fix Error RT

DIY Fix Basic reset and panel checks

  1. Record the exact error code and current temperature display.
  2. Attempt a basic reset by unplugging the refrigerator for 5–10 minutes and then plugging it back in.
  3. After restart, check if the RT code reappears.
  4. Ensure the door seals are fully closed and that the refrigerator isn’t overpacked (which can affect airflow and sensor readings).

Technician Only Diagnosis and replacement of temperature sensor

  1. Access the internal control board and RT/room temperature sensor wiring.
  2. Use a multimeter to verify sensor resistance and compare with manufacturer specifications.
  3. Replace faulty temperature sensor(s) if readings are out of spec.
  4. Check harness connections and control board communication paths for corrosion or damage.

Parts needed: RT/Room Temperature Sensor, Wiring harness, Control board (if related communication fault is present)

🛑 When to Call a Pro:
  • If the RT error persists after power cycling and basic reset attempts.
  • If there are additional symptoms such as no cooling or abnormal noises.
  • If you lack experience working with internal sensors or electronics.

Technical Specifications

wattage 200W
component Compressor
resistance 5-10 ohms
part_number LG 4681JA2003D
voltage_rating 115V AC

Common Questions

What does RT error mean on LG refrigerator?

RT error indicates a malfunction in the room temperature sensor, affecting cooling and temperature readings.

Can I fix LG refrigerator RT error myself?

Yes, you can try a basic reset by unplugging the refrigerator for 5–10 minutes and then plugging it back in.

How much does it cost to fix RT error?

Repair costs for the RT error range from ¥8,000 to ¥25,000, depending on the region and model.

When should I call a technician for RT?

Call a technician if the error persists after a reset, or if you notice no cooling or unusual noises.

Data last verified: 2026-01-10

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