LG · Laundry · WM4000HBA · Owner's Manual
After connecting the hoses, let water drain into a bucket and check the water temperature. This helps confirm that the hot and cold hoses are attached to the correct faucets.
Source: LG WM4000HBA Owner's Manual, extracted page 13
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Connect the Water Inlet Hoses
Follow these steps to connect the hot and cold water supply hoses correctly and check that they are clean and leak-free.
1) Connect the hoses to the faucets - Connect the water inlet hoses to the hot and cold water faucets by hand first. - After hand-tightening, tighten each connection another 2/3 turn with pliers. - Connect the blue hose to the cold water faucet. - Connect the red hose to the hot water faucet.
LG WM4000HBA Owner's Manual, extracted page 13Operation Problems: Leaks, Detergent Dispensing, Filling, and Cycle Behavior
This section helps you troubleshoot common washer problems such as leaks, detergent not dispensing correctly, filling issues, pauses during a cycle, and the washer stopping or not starting.
Banging noise when the washer is filling with water
LG WM4000HBA Owner's Manual, extracted pages 46-48This answer is only published when it has a reviewed answer status and a source citation back to the manual text.