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

  1. Turn the air conditioner off and disconnect power for at least 5 minutes.
  2. Ensure the connection between the indoor and outdoor units (wires/connectors) is secure if accessible.
  3. Restart the unit and see if the error clears.

Technician Only Diagnose communication lines and sensors

  1. Inspect the communication cable between indoor and outdoor units for continuity and damage.
  2. Check indoor unit coil outlet sensor resistance if accessible and compare with manufacturer specs.
  3. Use diagnostic tools to verify proper communication signals and sensor readings.

Parts needed: Communication wiring harness, Indoor unit sensors (coil outlet, thermistors)

🛑 When to Call a Pro:
  • 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.

Based on diagnostic data

Most relevant component to inspect

Thermistor

Measures precise temperature changes and sends resistance feedback to the control board.

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.

Find a part that fits my model

Verify the complete model and part number on the retailer's compatibility page before ordering.

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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: 2026-01-10

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