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
- Turn off the air conditioner and disconnect power (breaker or plug).
- Wait ~5 minutes and restore power to reset error codes.
- Observe if the error repeats when attempting normal operation.
Technician Only Inspect/Replace Indoor Coil Inlet Thermistor (Evaporator Sensor)
- Access the indoor unit’s control board and locate the coil inlet (evaporator) thermistor.
- Measure resistance of the thermistor; compare to expected specification for that model.
- If the thermistor is open, shorted, or out of expected range, replace the thermistor.
- 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
- 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
Next step
Choose the next step for 2
Confirm the diagnosis before ordering. An error code can identify the system involved, but it does not prove that a specific part has failed.
Most relevant component to inspect
Thermistor
Measures precise temperature changes and sends resistance feedback to the control board.
- Typical part-only price
- $15 - $35
- DIY difficulty
- Easy
- Estimated time
- 15-30 mins
Where can I find the model number?
Check the rating label around the door, lid, frame, rear panel, or inside the appliance cabinet. Use the complete model number, including suffixes.
Verify the complete model and part number on the retailer's compatibility page before ordering.
Other parts options
Check related components first; use model search as a fallback.
Wiring Harness
Connects controls, sensors, motors, and other electrical components inside the appliance.
Model-compatible Air Conditioner parts
Enter the complete model number to browse compatible replacement parts. This is a model-based parts search, not a diagnosis that a specific component failed.
Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. We may earn a commission from other qualifying purchases or service requests made through links on this page, at no additional cost to you. Recommendations are based on repair relevance, not commission rate.
Optional routine care
Maintenance supplies
These products support cleaning or routine upkeep. They are separate from the possible repair components above and are not claimed to fix this error code or symptom.
Air Conditioner Fin Cleaner
For routine cleaning of accessible coil fins when permitted by the manufacturer. Disconnect power and follow product and appliance instructions.
Model-Compatible Washable AC Filter
A reusable filter option only where the appliance supports one. Match the full model, dimensions, and filter specification.
Compatibility check required: use the complete appliance model and compare the existing filter, bag, or specification before ordering.
Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. Recommendations are based on routine-care relevance, not commission rate.
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: 2026-07-26
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