What to Check First
- The E15 error code appears on your LG SIGNATURE air purifier's display when dust or debris has built up on the Ultra Fine Dust Black Filter. Remove the filter, wash it in warm water with a mild detergent, let it dry completely in a shaded area, and then reinstall it to clear the error.
- The E15 error code appears when the Ultra Fine Dust Black Filter becomes dirty and restricts airflow. This alert helps protect your air purifier and maintain its performance. Simply cleaning the filter thoroughly will allow your air purifier to operate normally.
- Press the filter tray release button and pull the tray forward.
- Carefully remove the dirty filter from the tray.
- Mix a mild detergent with warm water (35 °C–40 °C / 95 °F–104 °F). Fully submerge the filter and soak it for about 30 minutes to loosen the dirt.
- After soaking, rinse the filter thoroughly under running water to remove any detergent residue.
- Place the filter at an angle in a well-ventilated, shaded area away from direct sunlight. Let it dry completely for 12–24 hours.
- Once the filter is completely dry, reinstall it, making sure it faces the correct direction.
- Check that the Photocatalyst Deodorizing Black Filter is properly installed, then push the tray all the way into the air purifier until it is fully closed.
- 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
Frequently Asked Questions
What should I check first for What are the causes and solutions for the E15 error code??
The E15 error code appears on your LG SIGNATURE air purifier's display when dust or debris has built up on the Ultra Fine Dust Black Filter. Remove the filter, wash it in warm water with a mild detergent, let it dry completely in a shaded area, and then reinstall it to clear the error.
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.