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[LG Air Conditioner Air Purification] Suddenly the fine dust level

2. You are not recommended to use it together with an ultra sonic humidifier in the winter. During or after humidifier operation, the fine dust density might tend to be high for a longer time than usual. If you must use it, then make sure to keep the minimum distance of 2.5 (8.2ft) meters and pay attention to the fact that the fine dust density can go….

[LG Air Conditioner Air Purification] Suddenly the fine dust level rises. LG USA help image
[LG Air Conditioner Air Purification] Suddenly the fine dust level rises. LG USA help image 2
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TroubleshootingAir Conditioners

What to Check First

  1. 2. You are not recommended to use it together with an ultra sonic humidifier in the winter. During or after humidifier operation, the fine dust density might tend to be high for a longer time than usual. If you must use it, then make sure to keep the minimum distance of 2.5 (8.2ft) meters and pay attention to the fact that the fine dust density can go higher.
  2. ※ Natural evaporation type humidifier has a small water molecule size, so it does not affect our product, but as it encounters with neighboring dust particles or evaporated particles form a big lump, it can cause some reactions.
  3. PM1.0 sensor is a device to detect pollutions caused by fine dusts and large dusts, thus it requires periodic cleaning of the lens.
  4. 1. Check if the dust sensor and the gas sensor are applied to the product. Even if it is the product with the same design, depending on the model, there can be a sensor or not. See the following sensor applied product table.
  5. 2. Dust sensor lens location check and cleaning [PM1.0 SENSOR] is displayed. Open the sensor cover. The lens for the dust sensor is found at 10’o clock inside the product.
  6. 3. Cleaning the lens Put a little water on a cotton swab to clean the lens and wipe away any remaining moisture with a dry cotton swab.
  7. ※ In case of oily dusts, as the oil layer is formed, if you use water to clean it, you might end up making the lens surface even dirtier. In this case, use a cotton swab soaked in little bit of alcohol.

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 Air Purification] Suddenly the fine dust level rises.?

2. You are not recommended to use it together with an ultra sonic humidifier in the winter. During or after humidifier operation, the fine dust density might tend to be high for a longer time than usual. If you must use it, then make sure to keep the minimum distance of 2.5 (8.2ft) meters and pay attention to the fact that the fine dust density can go higher.

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

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Read the Official LG Guide