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Whirlpool Washer F21 Error Code

Drain problem (older front-loaders). Here is what it means and how to clear it, easiest fix first.

How to fix Whirlpool F21

1. Check the drain hose for kinks

   Pull the washer out carefully and straighten any kinks or bends in the drain hose. Make sure the hose isn't pinched behind the machine.

2. Look for clogs

   Check that the standpipe or sink drain isn't blocked. With the washer unplugged and a towel and pan ready, clean the drain pump filter if your model has one, removing lint and small objects. Let the water cool first if a hot cycle just ran.

3. Reset the washer's control

   Unplug the washer, or switch off its circuit breaker, and leave it without power for a full 5 minutes. Restore power, choose your cycle again, and press Start. A reset can sometimes clear a one-time glitch in the electronics.

When to call a technician

If the drain path is clear and F21 keeps returning, have a technician test the drain pump and replace it if needed.

Parts that commonly cause F21

• Drain pump
• Drain hose

Order parts by your exact model number so they fit.

Other Whirlpool washer codes

• F5E1Door or lid switch not detecting closed
• F5E2Door or lid won't lock
• F5E3Door or lid lock error
• F8E1Long fill or low water flow
• F9E1Long drain time
• F0E1Items found during Clean Washer cycle
• F0E2Too many suds
• F7E1Motor or basket speed problem
• F3E1Water level sensor problem
• F6E2Control communication error
• F0E5Unbalanced load
• oLWasher overloaded
• HCHot and cold hoses reversed

Frequently asked questions

What does F21 mean on a Whirlpool washer?

F21 is an older-style front-load code meaning the washer couldn't drain properly. The causes match F9E1: a kinked or clogged drain hose, a clogged pump filter, or a failing pump.

Can I fix Whirlpool F21 myself?

Often. The first steps above are safe checks a homeowner can do. If they don't clear F21, the cause is likely a worn part that needs replacing.

What if F21 keeps coming back?

A code that returns after a reset and the checks above usually means a part is wearing out. Note when F21 appears (which cycle, how often) and have your model number ready; it helps a technician bring the right part on the first visit.

Last reviewed 2026-10-19. Codes and steps can vary by model; check your owner's manual.