LG · Laundry · WM4000HBA · Owner's Manual
That is normal for an HE (High-Efficiency) washer. It uses a minimum amount of water and energy, and the low water level makes the detergent more concentrated for effective cleaning.
Source: LG WM4000HBA Owner's Manual, extracted page 43
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Wash Cycles Guide
The washer has different cycles designed for specific types of laundry. For best washing performance and fabric care, choose the cycle that matches the load contents. LG also recommends following the care labels on your garments. For help reading fabric care symbols, see the Sorting Laundry section.
To choose a cycle: - Turn the knob or press the button to select the desired cycle. - When a cycle is selected, the light for that cycle turns on.
LG WM4000HBA Owner's Manual, extracted pages 25-28Troubleshooting Overview
Your washer has an automatic error-monitoring system that detects and helps diagnose problems early. If the washer does not work properly or does not work at all, check the items below before calling for service.
For more detailed information or videos, LG directs you to the troubleshooting page at www.lg.com.
LG WM4000HBA Owner's Manual, extracted page 43This answer is only published when it has a reviewed answer status and a source citation back to the manual text.