How do I clean the pump filter on a Whirlpool washer to fix F21?

Open the access panel at the bottom-front of the washer. Place towels and a shallow pan underneath. Pull out the small drain hose and uncap it to drain standing water into the pan first. Then unscrew the pump filter cap counterclockwise, remove the filter, and clean out all lint, coins, and debris under running water. Reinstall firmly and run a drain cycle to test.

How do I know if the drain pump has failed on my Whirlpool washer?

After cleaning the filter and checking the hose, if F21 still appears, the drain pump may have failed. Listen during the drain cycle — you should hear a humming or whirring sound from the pump. If the pump is silent or makes a grinding noise, a technician should test the pump motor windings with a multimeter and inspect the impeller for jammed debris.

Whirlpool Washer F21 Error Code — Causes & Fix Guide (2026)

Q: Can I reset my Whirlpool washer to clear the F21 code?

You can reset the washer by pressing Pause/Cancel twice and then Power to turn it off, then unplug it for 1 minute. However, this only clears the code display — it does not fix the underlying drain problem. F21 will return on the next cycle if you have not addressed the filter, hose, or pump.

F21 Error — Quick Summary

F21 means: Drain time exceeded — washer cannot empty in time
Cause 1 (most common): Clogged pump filter (coin trap)
Cause 2: Kinked or blocked drain hose
Cause 3: Failed or jammed drain pump
Also check: Blocked standpipe or laundry sink
Repair cost if pump needed: $150–$350 | $89 diagnostic waived with repair

The F21 error code on a Whirlpool front-load washer means the drain time was too long — the machine could not empty the tub of water within its programmed limit (approximately 8 minutes). The washer stops to prevent overflow and displays F21 on the control panel. This is one of the most common Whirlpool washer errors, and in the majority of cases it is caused by a clogged pump filter that takes less than 15 minutes to clean.

What Does F21 Mean on a Whirlpool Washer?

F21 is specifically a long drain error. The washer's control board monitors how long the drain pump has been running. If the tub has not emptied within approximately 8 minutes (some models allow up to 10 minutes), the board stops the pump, displays F21, and locks the cycle to prevent overflow.

F21 appears most often at the end of the wash cycle when the washer first tries to drain, but it can also occur during the rinse phase or at the start of the spin cycle.

Step-by-Step Fix for Whirlpool Washer F21

Stop the cycle and prepare your workspace

Press Pause/Cancel twice to cancel the cycle, then press Power to turn the washer off. Get several old towels and a shallow pan or baking dish. The pump filter is at the bottom-front of the machine, behind a small access panel.

Open the access panel and drain residual water

Open the lower access panel (it may snap open or be held by two screws depending on your model). You will find a round filter cap and, next to it, a small drain hose. Pull the drain hose out and uncap it over your pan to drain standing water from the tub before opening the filter — skipping this step will spill a large amount of water on your floor.

Remove and clean the pump filter

Once the emergency drain hose flow slows, unscrew the round filter cap counterclockwise (it may require some force on first removal). Pull the filter straight out. You will likely find a collection of lint, coins, buttons, hair ties, and miscellaneous small items. Remove all debris, then rinse the filter thoroughly under running water. Use a small brush to clean the screen mesh if it is packed with lint.

Inspect the pump impeller and housing

With the filter removed, reach into the pump housing and manually turn the impeller (the small plastic propeller visible inside). It should rotate freely. If it is stiff, stuck, or rattling, there is debris inside the pump body — a technician will need to access and clear it or replace the pump.

Reinstall the filter and test

Screw the filter cap back in firmly — counterclockwise to loosen, clockwise to tighten. Ensure it is snug to prevent leaks during the next cycle. Close the access panel. Run a short cycle or select Drain & Spin and watch for F21. If the cycle completes normally, you are done.

If F21 returns — check the drain hose

Pull the washer away from the wall. Inspect the corrugated drain hose along its full length for kinks, crushing, or blockages. Straighten any bends. At the standpipe connection, confirm the hose is not inserted more than 20 cm (8 inches) deep and is not sealed or taped in — both conditions cause siphoning or prevent proper drainage.

If F21 still returns — test the drain pump

If filter cleaning and hose inspection have not resolved F21, the drain pump motor itself has likely failed or is failing. Listen for a humming sound during the drain attempt — silence indicates the motor is not running. A technician will test the pump motor windings with a multimeter and replace the pump assembly if it has failed.

Prevention: Check and clean the pump filter every 4–6 weeks. Run a monthly Machine Clean cycle (using a commercial washer cleaner or 2 cups of white vinegar with no laundry) to prevent detergent and lint build-up in the drain system.

Common Reasons Whirlpool Washers Get Repeated F21 Codes

If your Whirlpool washer shows F21 repeatedly — even after you have cleaned the filter — consider these less obvious causes:

Overloading: Very large or dense loads (denim, towels, rugs) take much longer to drain. The pump must push a higher volume of water more quickly. Try reducing load size.
Standpipe too low or clogged: A household drain pipe that is itself slow to drain (common in older homes) will back up into the washer hose, preventing drainage. Test by running water down the standpipe with a garden hose.
Partially clogged hose interior: Over years, the interior of the drain hose can accumulate a thick residue of detergent, lint, and biological growth. Replace the hose if interior cleaning is not effective.
Failing pump motor: A pump motor that is beginning to fail will sometimes work and sometimes not, making F21 appear intermittently. Intermittent F21 is a strong indicator that the pump motor should be tested.

F21 on Whirlpool Cabrio and Duet Models

F21 is most commonly associated with Whirlpool Duet front-load washers, but the same code (or an equivalent long drain fault) appears on Whirlpool Cabrio top-load models and on brand-equivalent Maytag and Kenmore machines that share the same platform. On Cabrio top-loaders, the pump filter is not accessible from a bottom-front door — the pump is accessed by removing the washer cabinet, making pump service a job for a technician.

When to Call a Certified Technician for F21

F21 returns after filter cleaning and hose inspection — pump failure needs professional diagnosis
The pump impeller cannot be turned by hand — debris is jammed inside the pump body
You have a Cabrio or other top-load model — pump access requires cabinet disassembly
Water is leaking from the filter housing or access panel area — the pump seal or housing may be cracked
The pump makes a grinding or loud humming noise but does not move water — partial pump seizure

Frequently Asked Questions — Whirlpool Washer F21

F21 on a Whirlpool front-load washer means the drain time exceeded the limit — the washer could not empty the tub within approximately 8 minutes. The three most common causes are a clogged pump filter (coin trap), a kinked or blocked drain hose, and a failed drain pump motor.

Open the access panel at the bottom-front of the washer. Place towels and a shallow pan underneath. Pull out the small drain hose and uncap it to drain standing water first. Then unscrew the pump filter cap counterclockwise, remove the filter, and clean out all lint, coins, and debris under running water. Reinstall firmly and run a drain cycle to test.

Yes. A kinked, crushed, or improperly installed drain hose is a common cause of F21. Pull the washer away from the wall and inspect the hose along its full length. Straighten any kinks. Ensure the hose is not inserted more than 8 inches (20 cm) into the standpipe — too deep creates a siphoning effect.

After cleaning the filter and checking the hose, if F21 still appears, the drain pump may have failed. Listen during the drain cycle — you should hear a humming or whirring sound. If the pump is silent or makes a grinding noise, a technician should test the pump motor windings and inspect the impeller.

No. F21 indicates a physical drain obstruction or pump failure that will not resolve on its own. You need to identify and fix the root cause. Attempting to run more cycles without addressing the drain issue will result in the same error repeating.

You can reset the washer by pressing Pause/Cancel twice then Power to turn it off, then unplug it for 1 minute. However, this only clears the code display — it does not fix the underlying drain problem. F21 will return on the next cycle if the filter, hose, or pump issue has not been addressed.

If cleaning the pump filter solves it, there is no cost. If the drain pump has failed, professional repair in Toronto and the GTA typically costs $150–$350. Nick's Appliance Repair charges an $89 diagnostic fee waived with repair, plus $40 OFF any repair right now.