LG WM3670HVA Won't Drain – What Part Fixes This Problem?
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Understanding the Problem
When an LG WM3670HVA washer fails to drain, water is left in the drum at the end of the cycle or the washer pauses and shows a drain-related error. Most often the issue is caused by a blockage (debris, lint, coins) in the drain system, a failed drain pump motor, or a kinked/obstructed drain hose. Electronic failures (control board, pressure switch) are less common but possible if mechanical causes are ruled out. Diagnosing a no-drain condition is straightforward: listen for the drain pump during a drain or spin cycle, check for error codes on the display, inspect the drain hose and pump filter for obstructions, and test the drain pump electrically if you have a multimeter. Replacing a faulty drain pump or clearing a blockage will usually return the washer to normal operation. Always unplug the washer and turn off the water before working on it, and consult the service manual or a parts diagram for your exact model number to ensure correct parts fit.
Common Symptoms
Water remains in the drum after a cycle, washer stops and displays a drain error, strong humming without water movement, or leaking at the pump/hose area.
Common Causes
- Clogged drain pump filter or pump inlet (lint, coins, small clothing items)
- Failed drain pump motor (electrical failure or seized impeller)
- Blocked, kinked, or improperly installed drain hose or clogged household drain
Popular Parts That Fix This Problem
These are the most common replacement parts that fix this problem. When you're ready to order, click below to find the right part at PartsDiscount.com — just search by your appliance model number for a guaranteed fit.
Helpful Repair Tip
Run a drain/spin cycle and listen near the front bottom of the washer for the pump motor. If you don’t hear it and the filter is clear, test the pump motor for continuity with a multimeter—no continuity usually means a bad pump.
Frequently Asked Questions
How can I tell if the drain pump is bad?
Start by running a drain/spin cycle and listen for the pump. If you hear nothing or only a humming noise and water doesn’t move, remove the pump filter/access cover (bottom front) and check for obstructions. If clear, unplug the washer and test the pump motor windings with a multimeter for continuity; an open circuit indicates a failed pump that needs replacement.
Can a clogged drain hose cause the washer to stop draining?
Yes. A clogged, kinked, or elevated drain hose or a blockage in the household drain line will prevent water from leaving the washer. Inspect the entire hose length for kinks or debris, disconnect and flush it if necessary, and ensure the hose is installed to the manufacturer's recommended height and not submerged in standing water.
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