What to Check First
- Dry the washed air filter completely in a well-ventilated, shaded area. Direct sunlight may deform the filter. Make sure it is completely dry before reinstalling.
- An unpleasant odor from your LG air conditioner is typically caused by moisture and mold buildup on the internal heat exchanger, or a dirty air filter. You can easily resolve this by lowering the temperature below 20℃ (68℉), running Fan mode to dry the inside, and washing the air filter.
- During normal cooling operation, moisture condenses on the internal heat exchanger. This is similar to condensation forming on a glass cold of water on a hot summer day. If the heat exchanger remains wet, odors can get trapped or mold can grow. As a result, the air coming out may have a musty smell, similar to a damp towel.
- Set your air conditioner to 20℃ (68℉) or lower. This keeps the heat exchanger cooling continuously, which helps reduce odors.
- After using Cool mode, switch to Fan mode for about 30 minutes before turning off the unit. This will dry any remaining moisture on the heat exchanger and significantly reduce odors.
- A dirty air filter can cause odors. Follow your user manual to remove the filter and wash it thoroughly with water.
- If the odor persists after following these steps, the internal components may need to be professionally disassembled and cleaned.
- If these steps don’t resolve the issue, visit the LG Customer Support website for further assistance. You can explore available support options, such as chat support or a technician visit, depending on your region. • Service fees may apply for technician visits if the product is out of warranty. • This guide is based on standard models. Actual settings and menus may vary by model and region. • This content was partially edited using AI for clarity.
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 Why your LG air conditioner smells bad and how to fix it?
Dry the washed air filter completely in a well-ventilated, shaded area. Direct sunlight may deform the filter. Make sure it is completely dry before reinstalling.
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.
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