The F21 error code is one of the most common Kenmore front-load washer error codes. It means the washer took longer than 8 minutes to drain completely, indicating a drain system problem. The washer will pause the cycle and display F21 to prevent the pump from burning out.
Causes of the Kenmore Washer F21 Error
- Clogged pump filter (the most common cause)
- Blocked or kinked drain hose
- Foreign object (coin, button, sock) lodged in the drain pump
- Faulty drain pump motor
- Clogged standpipe or sink drain
Troubleshooting the F21 Error
- Clean the pump filter: On most Kenmore front-load washers, the filter is behind a small access panel at the lower front. Place towels and a shallow tray — water will come out. Unscrew the filter cap slowly, catch the water, remove the filter, and clean it thoroughly.
- Check the drain hose behind the washer for kinks.
- Check that the drain standpipe is not clogged.
- After cleaning the filter, run a Drain & Spin cycle to test.
When to Call a Professional
If cleaning the filter does not resolve the F21 error, the drain pump has likely failed and requires professional replacement. A damaged pump can also allow water to back up into the drum, potentially causing mold. Our technicians carry Kenmore drain pump assemblies and can complete this repair in under an hour.