Whirlpool Duet Washer F21 Error Code – Complete DIY Repair Tutorial
If your Whirlpool Duet washer is flashing the F21 error code, this video will walk you through how to diagnose and fix the problem yourself. The F21 error usually indicates a drainage issue, commonly caused by a clogged drain filter or debris stuck in the drain hose.
In this guide, we’ll show you how to safely disconnect power, access the filter trap behind the bottom panel, and clean out any lint, socks, or buildup that might be blocking proper drainage. You’ll also learn how to use a clothes hanger to dislodge deeper clogs and reassemble your washer correctly to avoid future leaks.
If this does not resolve the issue—or if your drain pump is not running at all—you’ll likely need to replace the washer's drain pump. We also offer guidance on identifying pump failure symptoms so you know when it’s time to replace the part.
This fix requires minimal tools and could save you hundreds in technician fees. Ideal for DIYers and anyone looking to avoid replacing a working washer due to a simple issue.
