Helpful Hints
A clean air conditioner does more than just look better. It can help your room feel fresher, improve airflow, and support cooling performance over time.
During everyday use, dust, moisture, cooking particles, and seasonal buildup can all affect how your air conditioner performs and feels. That's why air conditioner cleaning should be taken care of before you notice a difference. Keeping these under control with regular maintenance makes it easier to enjoy lasting comfort, hygiene, and efficient operation.
*This image is AI-generated.
Air conditioner cleaning is often thought of as something to keep the unit looking clean, but it can affect much more than appearance.
• A clogged filter can restrict airflow.
• Moisture left inside the unit may lead to musty odors.
• Dust buildup on internal cooling components can make the system feel less fresh and less efficient over time.
Regular maintenance becomes even more important if you have children or pets, live with family members who have allergies, cook frequently, or use your air conditioner heavily throughout the summer. In these situations, indoor air quality and easy maintenance become part of creating a more comfortable home environment.
Air conditioner cleaning is often thought of as something to keep the unit looking clean, but it can affect much more than appearance.
The answer isn't "once a year" or "when you can see dust." The right time to clean your air conditioner depends on both how you use it and its overall condition. Regular filter care, along with additional cleaning or maintenance when needed, can help maintain a more comfortable environment. If you notice any of the following signs, it may be a good time to inspect and clean your air conditioner.
Signs your air conditioner may need maintenance
✓ The air smells musty or stale when cooling starts.
✓ Airflow feels weaker than usual.
✓ It takes longer for the room to become comfortable.
✓ Dust is visible around the filter or air outlet.
✓ The air conditioner is being used again after a long period of inactivity.
• A clogged filter can restrict airflow.
• Moisture left inside the unit may lead to musty odors.
• Dust buildup on internal cooling components can make the system feel less fresh and less efficient over time.
Regular maintenance becomes even more important if you have children or pets, live with family members who have allergies, cook frequently, or use your air conditioner heavily throughout the summer. In these situations, indoor air quality and easy maintenance become part of creating a more comfortable home environment.
If you're cleaning your air conditioner for the first time, it can be difficult to know where to begin. Fortunately, the process is simpler than it might seem. Start with the filter, which needs the most frequent attention, then manage the moisture left behind after cooling, and finally take care of the parts inside the unit that aren't visible. Following these three steps can help keep your air conditioner in good condition.
The filter directly affects both airflow and cooling performance. As dust builds up, airflow may become restricted, so it is a good idea to check the filter regularly based on your usage environment and clean it when needed. You can take out the filter on LG DUALCOOL® AI, clean it, and reinstall it without a complicated process, helping make regular care more effortless.
How to clean your air conditioner filter1)
• Remove the filter from the air conditioner.
• Remove dust using a vacuum cleaner or a soft brush.
• If the filter is heavily soiled, wash it with lukewarm water mixed with a mild detergent.
• Let it dry completely in a well-ventilated shaded area away from direct sunlight.
• Reinstall the filter.
Not every filter can be washed with water. The Allergy Filter and Ultra Fine Dust Filter in LG DUALCOOL® AI Air require periodic replacement.2)
One of the most easily overlooked parts of air conditioner maintenance is managing moisture after use. Moisture left inside the unit may lead to unpleasant odors and can make the air feel less fresh the next time you turn on the air conditioner.
Auto Clean+ automatically dries the inside of the unit after cooling, helping reduce residual moisture and making routine maintenance more convenient. It also automatically calculates the appropriate drying time based on factors such as operating time, the set temperature, and the indoor temperature. This allows the unit to complete only the drying it needs, so you won't have to wait longer than necessary after turning it off.
Cleaning the filter alone is not enough to maintain the entire inside of your air conditioner. The inside of an air conditioner can be dark and humid, making it easier for dust and bacteria to build up. Internal components such as the heat exchanger can also be difficult to see or reach directly, making them harder to maintain. Freeze Cleaning³⁾, available on some LG DUALCOOL® AI models, forms a layer of ice on the heat exchanger and then melts it to help wash away accumulated dust and contaminants, while also helping reduce bacteria on the heat exchanger surface. This makes it easier to care for components that are difficult to clean directly without constantly having to use a separate cleaning service.
How Freeze Cleaning Works
• Freeze Cleaning is activated via the LG ThinQ® app.
• Ice forms on the surface of the heat exchanger.
• As the ice melts, it helps wash away dust and contaminants, which are then drained away.
• A drying cycle helps remove any remaining moisture inside the unit.
There are times when you first turn on your air conditioner after a long break, or when you're preparing to stop using it for an extended period. In these situations, try using All Cleaning4), which combines Auto Clean+ and Freeze Cleaning. From washing to drying, the entire process is completed automatically, making it easy to maintain the inside of the unit with the press of a button.
One of the biggest challenges in keeping your air conditioner clean is not the cleaning itself, but remembering when it's time to do it. It can be easy to put off routine maintenance by missing the right time to clean the filter or repeatedly turning off the unit without allowing the inside to dry after cooling. With LG ThinQ®, you can easily check your air conditioner's status and maintenance information. On supported models, features such as Filter Cleaning Alerts notify you when it's time for maintenance, helping you keep up with routine care without having to remember the schedule yourself.
*This image is AI-generated.
Keeping your air conditioner in good condition is less about occasional deep cleaning and more about keeping up with routine maintenance over time. Regularly cleaning the filter, allowing the interior to dry after use, and using interior cleaning features when needed can all help maintain a fresher cooling experience. Combined with LG's smart maintenance features, these simple habits can reduce maintenance effort while making everyday air conditioner care more convenient.
Cleaning the filter every two weeks is a commonly recommended guideline, but the ideal cleaning frequency depends on your usage and environment. If you have pets, cook frequently, or live in a dusty area, the filter may become dirty more quickly, so it's a good idea to check its condition regularly. On supported LG air conditioner models, smart maintenance alerts can also help you keep track of when it's time to clean the filter.
Yes. Before leaving your air conditioner unused for an extended period, it's recommended to dry the interior thoroughly and clean the filter. Before using it again after a long break, checking the filter and the inside of the unit can help maintain a fresher and more comfortable cooling experience. On supported models, features such as All Cleaning can make seasonal maintenance more convenient.
Routine maintenance, such as cleaning the pre-filter and wiping the exterior, can usually be done at home. However, internal components that require disassembly or involve the refrigerant system should be serviced by a qualified technician to help ensure safe operation and maintain product performance.
1) Please check the owner's manual for detailed filter cleaning instructions.
2) Please refer to the Owners' Manual for details.
3) Freeze Cleaning
-TÜV Rheinland Korea, confirm that the evaporator freeze cleaning mode of LG air conditioners has bacteria reduction performance based on the test results at the proposed test condition. Report No. KR23LGPO, KR2357TB, KR2384CM, KR230H9, KR237102, KR235J9N, KR23OGEG.
-This test result obtained a test report on and Pseudomonas aeruginosa 99.0% reduction rate from an internationally recognized laboratory, which may vary depending on the actual environment.
-Test institution: TÜV Rheinland
-Test period: 2023. 04~05
-Test Model: SQ07EDETHN(SE), SQ06BDAWAJ(SA), SQ07SDJBAN(SJ), SQ09MDKWAN(SK)
-Test bacteria: Up to 99.0% reduction rate of "Pseudomonas aeruginosa" confirmed
-Depending on the environment, Freeze Cleaning mode operation time can be up to 65 minutes.
4) All Cleaning
*Applied to Single Split only.
*The application of functions may vary depending on the country and product. Please check the function specifications before purchasing the product for more details.
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