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How to Troubleshoot Error Codes CH01, CH02, CH06, CH12, CH41, CH42

If your air conditioner displays error codes CH01, CH02, CH06, CH12, CH41, CH42, CH43, CH44, CH45, CH46, CH47, CH48, E1, E2, E3, E7, E8, F2, or F3, it indicates a problem with a sensor. Error codes CH21, CH23, CH26, CH29, and E9 indicate a problem with the outdoor unit compressor or circuit board. To clear the error, reset your air conditioner. If the error….

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TroubleshootingAir Conditioners

What to Check First

  1. Do not disassemble the air conditioner or replace internal parts yourself. Doing so may cause fire, electric shock, serious injury, or death.
  2. If the same error code appears again after resetting the air conditioner, stop using the product and request service to prevent further damage.
  3. 1.Unplug your air conditioner. If you cannot access the power plug, turn off the circuit breaker.
  4. 2.Wait about five minutes.
  5. 3.Plug your air conditioner back in or turn on the circuit breaker.
  6. 4.Check if the error code has cleared.
  7. If your air conditioner displays error codes CH01, CH02, CH06, CH12, CH41, CH42, CH43, CH44, CH45, CH46, CH47, CH48, E1, E2, E3, E7, E8, F2, or F3, it indicates a problem with a sensor. Error codes CH21, CH23, CH26, CH29, and E9 indicate a problem with the outdoor unit compressor or circuit board. To clear the error, reset your air conditioner. If the error code persists, contact LG Support for service.
  8. If the issue persists after following the steps above, you can get further support through LG Chatbot on our website or by requesting a technician visit.
  9. Move left or right to check the contents.
  10. This guide was created for all models, so the images or content may be different from your product.

Why This Can Happen

Symptoms can have more than one cause, and the correct steps depend on the exact model, installation and operating conditions. Use the checks above to narrow the issue before service.

Safety and Model-Specific Guidance

Stop troubleshooting if you notice burning, electrical damage, unsafe heat, gas odor, refrigerant concerns, or water near electrical components. Follow the official LG USA instructions for your exact model.

Frequently Asked Questions

What should I check first for How to Troubleshoot Error Codes CH01, CH02, CH06, CH12, CH41, CH42, CH43, CH44, CH45, CH46, CH47, CH48, E1, E2, E3, E7, E8, F2, F3, CH21, CH23, CH26, CH29, and E9 on Your LG Air Conditioner?

Do not disassemble the air conditioner or replace internal parts yourself. Doing so may cause fire, electric shock, serious injury, or death.

When should I stop troubleshooting and contact LG?

Stop if the product shows signs of electrical damage, burning, leaking near electrical components, or if the recommended checks do not resolve the issue. Use LG USA support for model-specific service guidance.

Does this guidance apply to every LG model?

Not always. Controls, error codes and service steps can differ by model. Confirm the exact model number and follow the linked LG USA article for model-specific instructions.

Related LG Products

These model pages are linked because the stored category or exact model matches this Help Library topic.

Buying Guides for This Product Type

Efficiency & running costAir Conditioner Efficiency, Energy & Running-Cost GuideHousehold use caseAir Conditioner Family & High-Use Household GuideFeatures & valueAir Conditioner Features Worth Paying For — Value GuideFit & installationAir Conditioner Fit, Installation & Delivery Planning

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Read the Official LG Guide