Error Code: F21 Whirlpool

Whirlpool Duet Error F21: Long Drain

F21 is the classic drain error for Duet washers.

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The Logic Verdict

Clean the Filter. It’s always the filter.

What It Means

The F21 code stands for Long Drain.

Common Causes

  1. Clogged drain filter (coins, socks, hair).
  2. Bad drain pump.

Step-by-Step Fix

  1. Remove Panel: Bottom front panel (3 screws).
  2. Unscrew Filter: Have a shallow pan ready.
  3. Clear Debris: Remove the gunk.

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