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[LG Dishwasher] What is UV sterilization — LG Help Guide: Causes

- An ultraviolet lamp (UV lamp) and cooling fan turn on after a cycle to keep inside of a dishwasher clean even when dishes are not taken.

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TroubleshootingWashers

What to Check First

  1. - An ultraviolet lamp (UV lamp) and cooling fan turn on after a cycle to keep inside of a dishwasher clean even when dishes are not taken.
  2. out. It is safe to take out dishes during UV sterilization (when St is shown on display).
  3. - The UV lamp will be turned on after washing, rinsing, and drying.
  4. As an inverter that starts the UV lamp needs time for preheating, the lamp will be turned on 2-5 minutes after a cycle, depending on circumstances.
  5. - UV lamp and cooling fan will be turned on alternatively for four hours after a cycle.
  6. - To start UV course, press UV and Start buttons.
  7. The cycle will start only a cooling fan and UV lamp without washing with water.
  8. As preheating of an inverter that turns on the UV lamp takes time, the lamp will be turned on 2-5 minutes after a cycle depending on.
  9. ※ Please refer to owner’s manual for how to set up and more details.
  10. (UV lamp turns on for 25 min and off for 95 min, this is repeated once for four hours in total).

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 Dishwasher] What is UV sterilization?

- An ultraviolet lamp (UV lamp) and cooling fan turn on after a cycle to keep inside of a dishwasher clean even when dishes are not taken.

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.

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LG SIGNATURE-WM9901HBA — Washers Model

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Read the Official LG Guide