What to Check First
- The water softening setting on the dishwasher may be set too low.
- The water softening system may not be functioning effectively as salt has not been refilled.
- Tap water contains some amounts of mineral substances such as calcium and magnesium.
- After the dishwasher’s interior dries, the mineral substances are visible as white residues on dishes and the tub. LG dishwashers are equipped with a water softening system designed to reduce the mineral content in the water.
- ➔ Use the test strip provided with the user manual to assess the hardness of your water.
- ➔ When using the dishwasher for the first time, the default softening level is set to H0. Adjust the setting so that it is appropriate for the hardness level of your tap water.
- ➔ This indicates that the salt used in the water softening system has been depleted. Add high-purity salt (99%) to the salt container.
- This guide was created for all models, so the images or content may be different from your product.
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 LG Dishwasher - How to Remove White Spot Residue?
The water softening setting on the dishwasher may be set too low.
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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