Whirlpool Washer Error Code F21: Meaning, Causes, and Easy Fixes

What Does Whirlpool Washer Error Code F21 Mean?

Error code F21 = Long Drain Error

The washer is not able to drain water within the expected time (typically 8 minutes). As a safety measure, the cycle stops and the error appears on the display.

Common Causes of Whirlpool Washer F21 Error

Several issues can block or slow down drainage:

1. Clogged Drain Pump Filter

• Lint, coins, hairpins, or debris block the filter

• Most common cause of F21

2. Blocked or Kinked Drain Hose

• Hose bent behind the washer

• Dirt or residue clogging the hose

3. Faulty Drain Pump

• Pump motor not spinning

• Pump damaged or worn out

4. Excessive Suds

• Too much detergent

• Non-HE detergent used in HE washer

5. Electrical or Control Board Issue

• Loose wiring to the pump

• Rare, but possible

How to Fix Whirlpool Washer Error Code F21 (Step-by-Step)

Step 1: Cancel the Cycle and Unplug the Washer

• Press Pause/Cancel twice

• Unplug the washer for safety

Step 2: Drain the Remaining Water

• Place towels or a shallow tray under the washer

• Slowly open the drain pump filter cap

• Let the water drain completely

Step 3: Clean the Drain Pump Filter

• Remove debris like coins, lint, buttons

• Rinse the filter with warm water

• Check inside the pump housing for blockages

Step 4: Inspect the Drain Hose

• Straighten any kinks

• Detach the hose and flush it with water

• Ensure proper height (not too high or too low)

Step 5: Check for Excess Detergent

• Use HE detergent only

• Reduce detergent quantity

• Run a rinse cycle to clear excess suds

Step 6: Test the Washer

• Plug the washer back in

• Run a Drain & Spin cycle

• Confirm the F21 code is gone

When Should You Call a Technician?

Call a professional if:

• F21 error keeps returning

• Drain pump makes a humming sound but doesn’t drain

• Washer smells burnt or trips the breaker

• You suspect a control board issue

In these cases, the drain pump or internal wiring may need replacement.

Can You Prevent Whirlpool F21 Error in the Future?

Yes. Follow these simple tips:

• Check pockets before washing

• Clean the drain filter every 1–2 months

• Use the correct amount of HE detergent

• Avoid overloading the washer

• Inspect the drain hose regularly

The Whirlpool washer error code F21 is usually caused by a drainage issue, and most of the time, it’s an easy DIY fix. Cleaning the drain filter and checking the hose can save you time and money.

If the error continues even after troubleshooting, professional service is the safest option to prevent further damage.

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