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LG Air Conditioner - Troubleshooting a CO Error Code: Causes, Checks

If the auto drying function is enabled, the display will show [SC] or [Co]. Even if you turn off the power, the unit might continue to operate for some time. Check if the auto drying function is enabled.

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TroubleshootingAir Conditioners

What to Check First

  1. If the auto drying function is enabled, the display will show [SC] or [Co]. Even if you turn off the power, the unit might continue to operate for some time. Check if the auto drying function is enabled.
  2. Status: [Co] is displayed on the display window of the product. Auto drying time: product off after 10 minutes of operation.
  3. ➔ The auto drying function is displayed on the remote control screen once the function is set.
  4. 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 LG Air Conditioner - Troubleshooting a CO Error Code?

If the auto drying function is enabled, the display will show [SC] or [Co]. Even if you turn off the power, the unit might continue to operate for some time. Check if the auto drying function is enabled.

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

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

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Read the Official LG Guide