LG Air Conditioner Error 23
⚡ Quick Answer: The LG air conditioner error code 23 indicates a communication failure between the indoor and outdoor units, often leading to the unit stopping operat... ✅ DIY Fixable
What Does Error 23 Mean?
The LG air conditioner error code 23 indicates a communication failure between the indoor and outdoor units, often leading to the unit stopping operation shortly after startup. This issue is typically linked to inverter or compressor startup problems, resulting in no cooling or heating. Symptoms may include the outdoor unit failing to engage properly and the display flashing. Addressing this error may involve checking for overheating in the inverter PCB or issues with the compressor startup.
Common Symptoms:
- Unit stops operation and displays code 23 shortly after start
- Outdoor unit may not spin or engage properly
- No cooling or heating occurs when code is displayed
Possible Causes
- Inverter PCB overheating or electrical fault (medium)
- Compressor startup or DC link voltage issue (medium)
How to Fix Error 23
DIY Fix Preliminary checks and soft reset
- Turn off the air conditioner using the remote control or main power switch.
- Fully disconnect power at the breaker or plug for at least 10 minutes.
- Restore power and attempt to restart the unit.
- Ensure outdoor unit has adequate ventilation and is free of debris blocking airflow.
Technician Only Diagnostic and repair by qualified HVAC technician
- Perform full diagnostic on inverter PCB and associated power electronics.
- Check DC link voltage and compressor start circuit integrity.
- Inspect outdoor unit wiring harness for corrosion or damage.
- Replace defective inverter PCB or compressor start components as needed.
Parts needed: Inverter PCB, Compressor start components, Power wiring harness
- Error persists after power reset
- Unusual noises from compressor or outdoor unit
- Repeated trips of circuit breaker
Next step
Choose the next step for 23
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
Compressor
Compresses refrigerant within the sealed cooling system and requires specialized service equipment.
- Typical part-only price
- $180 - $600
- DIY difficulty
- Hard
- Estimated time
- 120-240 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 | N/A |
|---|---|
| component | Communication Cable |
| resistance | N/A |
| part_number | LG 6711A20051A |
| voltage_rating | 220V AC |
Common Questions
What does 23 error mean on lg air conditioner?
Error 23 indicates a communication failure between indoor and outdoor units, stopping operation.
Can I fix lg air conditioner 23 error myself?
Yes, you can try preliminary checks like a soft reset and power cycling the unit.
How much does it cost to fix 23 error?
Repair costs for error 23 typically range from $200 to $800, depending on the model and region.
When should I call a technician for 23?
Call a technician if the error persists after a reset, or if you notice unusual noises or frequent circuit breaker trips.
Sources & References
Data last verified: 2026-07-26
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