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

  1. Turn off the air conditioner using the remote control or main power switch.
  2. Fully disconnect power at the breaker or plug for at least 10 minutes.
  3. Restore power and attempt to restart the unit.
  4. Ensure outdoor unit has adequate ventilation and is free of debris blocking airflow.

Technician Only Diagnostic and repair by qualified HVAC technician

  1. Perform full diagnostic on inverter PCB and associated power electronics.
  2. Check DC link voltage and compressor start circuit integrity.
  3. Inspect outdoor unit wiring harness for corrosion or damage.
  4. Replace defective inverter PCB or compressor start components as needed.

Parts needed: Inverter PCB, Compressor start components, Power wiring harness

🛑 When to Call a Pro:
  • Error persists after power reset
  • Unusual noises from compressor or outdoor unit
  • Repeated trips of circuit breaker

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: 2026-07-07

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