LG Air Conditioner Error 6
⚡ Quick Answer: The LG air conditioner error code 6 indicates a communication failure between the indoor and outdoor units. This disruption may prevent the unit from ... ✅ DIY Fixable
What Does Error 6 Mean?
The LG air conditioner error code 6 indicates a communication failure between the indoor and outdoor units. This disruption may prevent the unit from operating properly, often displaying the error code CH06/C6. In some cases, it may also relate to a sensor issue. To resolve, ensure that connections are secure and power cycle the unit.
Common Symptoms:
- Air conditioner stops operating and displays error code ‘6’ or ‘CH06/C6’
- Potential loss of communication between indoor and outdoor unit
- Possible sensor malfunction indication in some guides
Possible Causes
- Communication interruption between indoor and outdoor units (medium)
- Indoor unit coil outlet sensor issue (community source) (low)
How to Fix Error 6
DIY Fix Check basic communication and power
- Turn the air conditioner off and disconnect power for at least 5 minutes.
- Ensure the connection between the indoor and outdoor units (wires/connectors) is secure if accessible.
- Restart the unit and see if the error clears.
Technician Only Diagnose communication lines and sensors
- Inspect the communication cable between indoor and outdoor units for continuity and damage.
- Check indoor unit coil outlet sensor resistance if accessible and compare with manufacturer specs.
- Use diagnostic tools to verify proper communication signals and sensor readings.
Parts needed: Communication wiring harness, Indoor unit sensors (coil outlet, thermistors)
- If the error persists after power cycling and basic checks
- If you are uncomfortable inspecting electrical connections or internal components
- If there are signs of physical damage to wiring or sensors
Next step
Choose the next step for 6
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
Wiring Harness
Connects controls, sensors, motors, and other electrical components inside the appliance.
- Typical part-only price
- $20 - $120
- DIY difficulty
- Medium
- Estimated time
- 30-90 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.
Thermistor
Measures precise temperature changes and sends resistance feedback to the control board.
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.
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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 | 2000W |
|---|---|
| component | Control Board |
| resistance | 10-30 ohms |
| part_number | LG 6871A20045D |
| voltage_rating | 240V AC |
Common Questions
What does 6 error mean on lg air conditioner?
Error 6 indicates a communication failure between indoor and outdoor units.
Can I fix lg air conditioner 6 error myself?
Yes, try power cycling the unit and checking connections.
How much does it cost to fix 6 error?
Repair costs range from ¥5,000 to ¥20,000+ depending on parts and labor.
When should I call a technician for 6?
Call if the error persists after basic checks or if you're uncomfortable with electrical components.
Sources & References
Data last verified: 2026-07-26
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