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The F21 error code on a Whirlpool washing machine indicates a long drain problem. This means the washer is taking too long to drain water from the drum. When this happens, the machine stops the cycle to prevent damage and displays the F21 code on the control panel.

Common Causes

Several issues can cause the F21 error:

• A clogged drain pump filter

• A blocked or kinked drain hose

• Foreign objects stuck in the drain pump

• A faulty drain pump

• Slow or restricted household drainage

Small items such as coins, buttons, or fabric threads can easily block the drain system and trigger this error.

How to Fix the F21 Error

Before calling a technician, you can try a few basic checks:

1. Disconnect the washer from power for safety.

2. Check the drain hose behind the machine and make sure it is not bent or blocked.

3. Open the pump filter access panel (usually located at the bottom front of the washer).

4. Remove any debris or foreign objects from the filter.

5. Reinstall the filter and run a drain or spin cycle.

If the washer still shows the F21 error after cleaning the filter, the drain pump may need professional inspection or replacement.

When to Call a Technician

You should consider professional repair if:

• The washer still does not drain

• The pump makes unusual noise

• The washer stops mid-cycle repeatedly

• Water remains inside the drum

A qualified technician can test the drain pump, wiring, and control board to restore proper operation.

Preventing Drain Errors

To avoid future drain issues:

• Check pockets before washing clothes

• Clean the pump filter regularly

• Avoid washing small loose items without a laundry bag

• Perform periodic maintenance of the washer

Proper maintenance will help extend the life of your Whirlpool washer and prevent unexpected interruptions.