What to Check First
- I cooked food indoors.
- There is a humidifier next to it.
- The outside air is coming in through the ventilation system.
- PM1.0 (dust) sensor is contaminated.
- Is the concentration of indoor fine dust exceptionally high even if an air purifier is used?
- In winter, outdoor fine dust levels are high, so operating an air purifier may not reduce indoor dust levels. In this case, first check the ventilation system to see if polluted air from outside is entering indoors. Also, if you use the air purifier in a place larger than the capacity of the product, the air cleaning performance may not be sufficient.
- ➔ When cooking, open the window to ventilate and turn on the air purifier after you’re done cooking.
- Fine dust is generated when you cook with the windows closed. If you use an air purifier in this condition, the grease particles can adhere to the filter, and the filter replacement cycle can be shortened. When cooking, turn off the air purifier and open the window to ventilate. Turning on the air purifier after cooking can effectively eliminate fine dust while saving filter life.
- ➔ Dust sensors applied to PuriCare air purifiers identify water molecules emitted from ultra-soundwave/heating humidifiers as dust particles.
- We do not recommend using air purifiers together with ultrasonic/heated humidifiers. If you want to use a humidifier, using a natural vaporization humidifier is recommended.
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 Purifier] Fine dust concentration is high in winter?
I cooked food indoors.
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.