Washer stops with F21, will not drain or takes a very long time to drain, water left in tub.

Safety first: Unplug the washer. Have towels and a shallow pan ready for water drainage.

Step-by-step:

• Inspect drain hose: Ensure the hose is not kinked or blocked. Remove the hose from the standpipe and check for obstructions at the end.
• Clean pump filter: Remove the lower front access panel. Place a pan under the pump. Slowly open the pump clean-out cap to drain water. Remove lint, coins, and debris from the filter and pump housing.
• Check impeller: Reach into the pump and gently spin the impeller. Remove any objects and ensure it spins freely.
• Check standpipe: Verify the home drain is not clogged by running water from a sink or tub into the same drain and observing flow.
• Test drain: Reassemble, plug in, and run a drain/spin cycle. If the pump hums but does not move water, or is noisy, the pump may be failing.
• Replace pump: If cleaning does not resolve F21, replace the drain pump assembly with a genuine Maytag-compatible part.