Washer stops with water in drum; F21 displayed, often after a long attempt to drain.

Safety First: Unplug the washer. Expect water spillage when opening the pump filter; use towels and a shallow pan.

Step-by-step checks:

• Clean pump filter: Remove the lower front access panel. Slowly open the drain pump clean-out cap and drain water into a pan. Remove all debris from the filter and pump cavity.
• Inspect hoses: Detach and inspect the tub-to-pump and pump-to-drain hoses for socks, coins, or buildup. Clean thoroughly.
• Check standpipe: Ensure the home drain is not slow or backing up. A restricted standpipe can cause long drain times.
• Test pump: Run a drain/spin cycle and listen for the pump. If it is noisy, intermittent, or not moving water, test for proper voltage at the pump and replace if faulty.

When to replace: Replace the drain pump assembly if it receives power but does not pump effectively or is excessively noisy.