Lg Air Conditioner Error 2

⚡ Quick Answer: The LG air conditioner error code 2 indicates a communication failure between the indoor and outdoor units, typically caused by a fault in the indoor ... ⚠️ Difficulty Varies

What Does Error 2 Mean?

The LG air conditioner error code 2 indicates a communication failure between the indoor and outdoor units, typically caused by a fault in the indoor evaporator temperature sensor (coil inlet thermistor). This error can lead to the unit stopping shortly after starting and improper indoor air temperature control, often accompanied by a blinking display.

Common Symptoms:

  • Unit stops shortly after starting
  • Indoor air temperature not controlled properly
  • Error code 02 (or CH02) appears on display or via blinking pattern

Possible Causes

  • Indoor evaporator temperature sensor (coil inlet thermistor) fault (medium)

How to Fix Error 2

DIY Fix Check Basic Unit Conditions and Reset

  1. Turn off the air conditioner and disconnect power (breaker or plug).
  2. Wait ~5 minutes and restore power to reset error codes.
  3. Observe if the error repeats when attempting normal operation.

Technician Only Inspect/Replace Indoor Coil Inlet Thermistor (Evaporator Sensor)

  1. Access the indoor unit’s control board and locate the coil inlet (evaporator) thermistor.
  2. Measure resistance of the thermistor; compare to expected specification for that model.
  3. If the thermistor is open, shorted, or out of expected range, replace the thermistor.
  4. Verify connectors and wiring harness for corrosion or damage and repair as needed.

Parts needed: Evaporator inlet thermistor (indoor unit sensor), Potential wiring harness or connector replacements

🛑 When to Call a Pro:
  • Error persists after reset and basic checks
  • Unit continues to show code 02 during normal use
  • Thermistor measurements are out of specification or wiring appears damaged

Technical Specifications

wattage 1500W
component Control Board
resistance 5-10 ohms
part_number LG EBR78945601
voltage_rating 230V AC

Common Questions

What does 2 error mean on lg air conditioner?

Error 2 indicates a communication failure often due to a faulty indoor evaporator temperature sensor.

Can I fix lg air conditioner 2 error myself?

Yes, you can try resetting the unit and checking basic conditions. Turn it off, wait 5 minutes, then restore power.

How much does it cost to fix 2 error?

The estimated repair cost ranges from $30 to $120 for parts, plus labor depending on your region.

When should I call a technician for 2?

Call a technician if the error persists after a reset or if the thermistor measurements are out of specification.

Sources & References

Data last verified: 2026-01-10

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