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LG Air Conditioner - Black Water Coming Out of the Hose — LG Help

During initial operation, processing oil sprayed to help smooth operation of the product can be discharged. It is a temporary effect, so just keep monitoring while continuing to use the air conditioner.

LG Air Conditioner - Black Water Coming Out of the Hose LG USA help image
TroubleshootingAir Conditioners

What to Check First

  1. During initial operation, processing oil sprayed to help smooth operation of the product can be discharged. It is a temporary effect, so just keep monitoring while continuing to use the air conditioner.
  2. If there is too much dust in the filter or evaporator or if it is not cleaned, then black water can be discharged through the drain hose. Remove dust from the filter and the evaporator.
  3. ※ Black water discharged from the drain hose at the rear of the product.
  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 - Black Water Coming Out of the Hose?

During initial operation, processing oil sprayed to help smooth operation of the product can be discharged. It is a temporary effect, so just keep monitoring while continuing to use the air conditioner.

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

Household use caseAir Conditioner Family & High-Use Household GuidePerformance & capacityAir Conditioner Performance, Capacity & Everyday-Use GuideEfficiency & running costAir Conditioner Efficiency, Energy & Running-Cost GuideFeatures & valueAir Conditioner Features Worth Paying For — Value Guide

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Read the Official LG Guide