LG Air Conditioner Error 22

⚡ Quick Answer: The LG air conditioner error code 22 indicates a communication failure between the indoor and outdoor units, often due to DC link overvoltage or compr... ✅ DIY Fixable

What Does Error 22 Mean?

The LG air conditioner error code 22 indicates a communication failure between the indoor and outdoor units, often due to DC link overvoltage or compressor overcurrent protection faults. This situation can result in the unit not starting or abruptly stopping after operation begins, leading to reduced or no cooling output. Immediate attention is required to diagnose and resolve the underlying electrical issues.

Common Symptoms:

  • Unit displays error code "22" or "CH22" on the indoor unit or remote display.
  • Air conditioner will not start or stops operation shortly after starting.
  • Reduced or no cooling output during fault condition.

Possible Causes

  • DC link overvoltage or inverter DC bus voltage too high (medium)
  • Compressor overcurrent (compressor drawing too much current) (medium)

How to Fix Error 22

DIY Fix Basic checks and power cycle

  1. Turn off the air conditioner and disconnect power at the breaker.
  2. Wait at least 10 minutes to allow internal capacitors to discharge and the system to reset.
  3. Ensure nothing is blocking airflow around the indoor and outdoor units (e.g., furniture, leaves).
  4. Check and clean/replace the air filter to improve airflow and reduce compressor load.

Technician Only Electrical and inverter system inspection

  1. Measure supply line voltage to ensure it is within the range specified on the unit nameplate; correct unstable or high voltage issues.
  2. Inspect outdoor unit wiring for loose, damaged, or corroded connections that could cause voltage spikes.
  3. Test the inverter PCB and DC bus regulation circuits; replace if defective.
  4. Check compressor electrical characteristics (current draw) and motor condition.

Parts needed: Outdoor inverter PCB, Compressor, Wiring harness, Voltage regulation components

🛑 When to Call a Pro:
  • If the error persists after power cycling and basic user checks.
  • If there are signs of electrical burning, smoke, or unusual noises from the outdoor unit.
  • If supply voltage issues are suspected (frequent brownouts or overvoltage).

Next step

Choose the next step for 22

Confirm the diagnosis before ordering. An error code can identify the system involved, but it does not prove that a specific part has failed.

Based on diagnostic data

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.

Find a part that fits my model

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.

Possible related component

Wiring Harness

Connects controls, sensors, motors, and other electrical components inside the appliance.

$20 - $120 · Medium · 30-90 mins

Check fit & price
Model number required

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.

Find a part that fits my model

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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.

Maintenance supply

Air Conditioner Fin Cleaner

For routine cleaning of accessible coil fins when permitted by the manufacturer. Disconnect power and follow product and appliance instructions.

View maintenance supply
Maintenance supply

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.

Find one that fits my model

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 6711A20045B
voltage_rating 240V AC

Common Questions

What does 22 error mean on lg air conditioner?

Error 22 indicates a communication failure related to DC overvoltage or compressor overcurrent.

Can I fix lg air conditioner 22 error myself?

Yes, try power cycling the unit and ensuring no airflow obstructions.

How much does it cost to fix 22 error?

Repair costs range from ¥20,000 to ¥100,000+ depending on parts and labor.

When should I call a technician for 22?

Call if the error persists after basic checks or if you notice unusual noises or electrical burning.

Data last verified: 2026-07-26

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