What does error code F21 mean on a Whirlpool washer?

Drain problem. The washer has a drain problem.

Can I fix Whirlpool code F21 myself?

Start with these safe checks: Check that the drain hose isn't kinked or clogged. Unplug the washer for 5 minutes, then plug it back in. If it still won't drain, schedule service.

When should I call a technician for code F21?

If it still won't drain, schedule service. Unplug it or switch the breaker off before you remove any panel. Don't test or replace wiring, control boards, heating elements or motors under power. If you see scorching, smell burning, or the breaker trips again, leave it off and call a qualified appliance technician or electrician.

Whirlpool Washer Error Code F21: Drain problem

What F21 means

The washer has a drain problem.

Likely causes

Kinked or clogged drain hose

Safe first checks

Check that the drain hose isn't kinked or clogged.
Unplug the washer for 5 minutes, then plug it back in.

When to stop

If it still won't drain, schedule service.

Parts that may help

Only order a part once the checks above point to it, and match the part number to your model.

Pump Drain Plug - ¼" MPT$12.99

Checked against: Whirlpool Product Help: F21 front load washer. Codes can differ by model and year, so confirm with your owner's manual.