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[LG Air Conditioner] How to Check Air Conditioner Error Codes

The error codes for LG air conditioners can be checked by the numbers on the display or the number of times the LED lamp blinks, depending on the product type (wall-mounted, floor-standing, ceiling-mounted, etc.). If you want to know the cause of the error and how to solve it most easily and accurately, we recommend using the 'Smart Diagnosis' feature in the….

[LG Air Conditioner] How to Check Air Conditioner Error Codes LG USA help image
TroubleshootingAir Conditioners

What to Check First

  1. First LED: Indicates the error number in the ones place.
  2. Second LED: Indicates the error number in the tens place.
  3. Simply read the letters and numbers appearing on the display in order.
  4. LED lamp models: Indicate errors in the hundreds, tens, and ones based on the blinking interval of the lamp. (The display method may vary depending on the number of air outlets and lamps.).
  5. Display models: The English letters 'CH' and the error code number appear repeatedly at 0.5-second intervals.
  6. 1. After launching the LG ThinQ app on your smartphone, select 'Smart Diagnosis' from the 'Menu' tab at the bottom of the home screen.
  7. 2. Select the air conditioner product to be diagnosed, and start the smart diagnosis following the on-screen instructions.
  8. 3. Through the smart diagnosis results, you will be guided on the current status of the product, error symptoms, and specific solutions.
  9. 4. If it is difficult to resolve the issue using the provided instructions, you can solve the problem by connecting to the customer service center directly within the app.
  10. Using smartphone recording: When it is difficult to distinguish the error because the LED blinks quickly or is complex, like on a ceiling-mounted air conditioner, you can identify the error code much more easily by recording a video with your smartphone and slowly checking the repeating section.

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 [LG Air Conditioner] How to Check Air Conditioner Error Codes?

First LED: Indicates the error number in the ones place.

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

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Related Help Articles

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Read the Official LG Guide