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Whirlpool Washer F21 Error

Editorial & technical review
  • Written by ApplianceWorth Editorial Team
  • Technically reviewed by Victor — appliance technician
  • Last reviewed 2026-07-01
  • Applies to Whirlpool washers
  • Confidence medium
  • Sources Manufacturer service documentation and field-repair experience · Methodology · Report a correction

What this code means

The washer has a long-drain condition.

Most likely causes

  • Clogged pump filter
  • Restricted drain hose
  • Failed drain pump

Safe checks for the owner

  1. Unplug the washer.
  2. Drain water safely.
  3. Inspect the pump trap and hose.

Estimated U.S. repair cost

$190–$390, depending on model, access, parts availability and local labor.