LG Air Conditioner Error 10
⚡ Quick Answer: The LG air conditioner error code 10 indicates a communication failure between the indoor and outdoor units, often linked to fan or sensor issues. It ... ✅ DIY Fixable
What Does Error 10 Mean?
The LG air conditioner error code 10 indicates a communication failure between the indoor and outdoor units, often linked to fan or sensor issues. It can cause the unit to stop operating, with symptoms such as the display showing '10' or 'CH10' and the fans failing to function properly. Common causes include a malfunctioning discharge temperature sensor, an indoor fan feedback fault, or loose wiring connections. Taking prompt action can help restore normal operation.
Common Symptoms:
- Unit stops operation and displays 10/CH10
- Indoor or outdoor fan not operating as expected
- System does not start or shuts down shortly after start
Possible Causes
- Discharge temperature sensor open/short (outdoor unit) (medium)
- Indoor unit fan feedback fault/Hall effect sensor issue (medium)
- Loose or faulty wiring between sensors/fans and control PCB (medium)
How to Fix Error 10
DIY Fix Basic checks and reset
- Turn off the unit and disconnect power at the breaker or plug.
- Wait 5–10 minutes to allow internal modules to reset.
- Restore power and restart the air conditioner to see if error clears.
Technician Only Inspect and repair sensors/fan wiring
- Visually inspect wiring harnesses between indoor/outdoor units and control PCBs for breaks, corrosion, or loose connections.
- Test the outdoor discharge temperature thermistor and indoor fan Hall effect sensor with appropriate tools (multimeter/diagnostics).
- Replace faulty sensor or repair wiring as needed.
- Verify correct operation after repairs.
Parts needed: Outdoor discharge temperature sensor (thermistor), Indoor fan motor/Hall effect sensor assembly, Wiring harnesses, Control PCB (if damaged)
- If error persists after power reset and basic visual checks.
- If fan does not spin freely, shows mechanical blockage, or unusual noise occurs.
- If you are not trained in HVAC electrical diagnostics.
Next step
Choose the next step for 10
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
Temperature Sensor
Monitors the internal temperature to ensure correct operation and prevent overheating.
- 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.
HVAC Control Board
Controls fan, compressor, sensor, and communication functions in the HVAC unit.
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 | N/A |
|---|---|
| component | Control Board |
| resistance | N/A |
| part_number | LG 6711A20012B |
| voltage_rating | 220V AC |
Common Questions
What does 10 error mean on lg air conditioner?
Error 10 indicates a communication failure between indoor and outdoor units, typically involving fan or sensor issues.
Can I fix lg air conditioner 10 error myself?
Yes, you can try a basic reset by turning off the unit and restoring power after 5-10 minutes.
How much does it cost to fix 10 error?
Repair costs range from $150 to $500+, depending on parts and labor needed.
When should I call a technician for 10?
Call a technician if the error persists after resetting, or if you notice mechanical issues or unusual noises.
Sources & References
Data last verified: 2026-07-26
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