Washer-dryer combo stops with water in drum and displays F21; may take a very long time to drain.

Safety first: Unplug the unit and turn off water supply. Prepare towels and a shallow pan.

• Clean pump filter and housing: Access the drain pump as described for F02. Remove the clean-out cap and thoroughly clean the filter and pump cavity. Check the impeller for damage or looseness on the shaft.
• Inspect hoses: Remove and inspect both the tub-to-pump hose and the pump-to-drain hose. Flush them with water to remove soap scum and lint buildup.
• Check standpipe and home drain: A slow house drain can cause long drain times. Run water into the standpipe from a sink or hose to verify it drains quickly.
• Replace pump if weak: If the pump runs but water flow is weak and all hoses are clear, the pump motor or impeller may be worn. Replace the drain pump assembly.