To troubleshoot and resolve the F21 error code on a Kenmore washer, follow these steps:
- Check for any clogs or blockages in the drain hose or pump filter.
- Ensure the washer is not overloaded with clothes.
- Run a cleaning cycle with vinegar to remove any buildup.
- Reset the washer by unplugging it for a few minutes.
- If the issue persists, contact a professional technician for further assistance.