LG · Laundry · WM4000HBA · Owner's Manual
Yes. The manual lists clicking, spraying or hissing, humming or gurgling, water sloshing, and water being added after the washer has already begun to operate as normal operation sounds.
Source: LG WM4000HBA Owner's Manual, extracted page 45
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Using Detergent, Bleach, and Other Laundry Products
This washer uses an automatic dispenser drawer for many laundry products, but some products must go directly into the drum. For best results, use the correct compartment and do not overfill.
Before you add anything - Always use HE (High-Efficiency) detergent with this washer. - Follow the detergent, bleach, and softener manufacturer’s recommendations. - Use less detergent for soft water, light soil, or smaller loads. - Be extra careful with 2X and 3X concentrated detergents. Even a small extra amount can cause problems. - Never use more than the maximum amount recommended by the manufacturer. - Do not place or store detergent, bleach, or liquid fabric softener on top of the washer. These products can damage the finish and controls.
LG WM4000HBA Owner's Manual, extracted pages 21-22Noise, Vibration, and Water Hammer Troubleshooting
This section helps you tell the difference between normal washer sounds and sounds that may need attention.
Normal sounds during operation The following sounds are listed as normal operation:
LG WM4000HBA Owner's Manual, extracted page 45This answer is only published when it has a reviewed answer status and a source citation back to the manual text.