Whirlpool Duet Steam Washer Drain Pump Fix

Quick Answer

The drain pump removes wastewater from the drum during the cycle. The most common sign of failure is the washer stopping mid-cycle with an F21 error code or water remaining in the tub.

Ignoring a slow or noisy drain pump is how you end up with a flooded laundry room and a warped subfloor. I've seen water damage cost people way more than just fixing the pump in the first place. The good news is the pump sits right behind the bottom front panel, which makes this one of the more approachable washer repairs out there. An hour of your time beats a $300 service call every time.

WhirlpoolWasherSeverity: highDifficulty: intermediate94% DIY Success

Time to Fix

45–90 min

Difficulty

intermediate

Parts Cost

$65 – $145

Tools Needed

1/4 inch nut driver, Channel lock pliers

What Does the DRAIN-PUMP Code Mean?

These pumps usually hold up 5 to 8 years, but if someone's been washing loaded pockets or the filter hasn't been touched in years, you'll see failure way sooner. Honestly, replace the whole assembly, not just the motor. The plastic housing gets brittle, the seals wear out, and if you just swap the motor you're probably crawling back under this thing six months from now doing the job all over again.

Most Likely Causes

Based on aggregated repair data, here is the probability breakdown for this error code:

Foreign object jam45%

Motor winding failure25%

Bearing/Mechanical seizure15%

Clogged coin trap10%

Impeller breakage5%

Symptoms You May Notice

F21 or 'Sud' error code appearing on the display
Washer tub is still full of water after the cycle ends
Loud humming, growling, or rattling noise during the drain phase
Washer refuses to enter the high-speed spin cycle
Intermittent draining where it works once then fails the next time

Can you reset a Whirlpool washer to clear the DRAIN-PUMP code?

After clearing the filter or replacing the pump, you need to clear the F21 code. Unplug the washer from the wall for a full 60 seconds, not just 10 or 15. Plug it back in, select 'Drain and Spin', and press Start. The machine should run through the cycle without throwing the code again. If F21 comes right back, there's still a blockage somewhere or the pump isn't getting voltage from the control board.

Tools Required for Diagnosis

1/4 inch nut driverChannel lock pliersMultimeterShallow bucketOld towelsFlashlight

Diagnostic Checklist

Follow these steps in order. We start with the easiest external fixes before opening up the machine.

ComponentComponent Under Test

Expected Range10–20 ohms

ConditionIf Open (OL) or infinite, replace component.

Replacement Parts

If your diagnostic testing proves the component has failed, you will need a replacement. We recommend OEM parts over aftermarket for water-handling components.

Part Name	OEM Number	Estimated Price
Drain Pump AssemblyWPW10730972 · $65–$145	WPW10730972	$65 – $145

Frequently Asked Questions

Can I just replace the motor instead of the whole pump housing?

You can, but I don't recommend it. The plastic housing collects sediment and gets brittle over years of use. If the seal between the motor and housing fails six months from now, you're doing this whole job again. The complete assembly is usually only $20 to $30 more than buying the motor alone. Just buy the whole thing and be done with it.

Why does my washer show an F21 code even after I cleaned the filter?

If the filter's completely clear, the pump motor has probably failed electrically or the impeller stripped off the shaft. F21 just means the pressure switch didn't see the water level drop fast enough during the drain cycle. If the pump isn't spinning, the water sits there, the timer runs out, and the code fires. Do the ohm test on the motor next. That'll tell you pretty quickly if the pump's dead.

Is an aftermarket pump as good as the OEM Whirlpool part?

In my experience, aftermarket pumps work fine but tend to run a bit noisier and might not last as long. If you're planning on keeping this washer for another 5 or more years, spend the extra money on the OEM part, usually around $80 to $100. If you're on a tight budget and just need it working, a high-rated aftermarket unit from a reputable supplier will absolutely get the job done.

How do I get the water out of the washer if the pump is completely dead?

Best method is a wet-dry shop vac on the end of the drain hose. If that's not moving enough water, slowly unscrew the pump filter cap at the bottom front and let it drain into a shallow pan in stages. Don't open it all at once or you'll have a mess. A full load of water is way heavier than people expect, so have a couple big towels laid out before you start.

What does this repair cost if I just call a tech instead of doing it myself?

Expect to pay somewhere between $250 and $350 for a service call on a drain pump swap. That's usually a $75 to $100 diagnostic fee, plus an hour of labor, plus the part at retail markup. The pump itself is only $60 to $100 depending on OEM vs aftermarket. So yeah, if you've got two hours and you're comfortable with a multimeter, the math on doing it yourself is pretty obvious. Only real reason to call someone is if your machine is old enough that you're not sure it's worth saving.

Models Known to Experience DRAIN-PUMP Errors

This repair applies to most Whirlpool washers with this error code. Common model numbers include:

WFW94HEXW, WFW95HEXW, WFW97HEXL, WFW9500TC, WFW9400SW, WFW9600TA, WFW9200SQ

Written by

Mike Sullivan

Lead Appliance Repair Technician · 20 years experience

Last verified for technical accuracy on March 17, 2026