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Whirlpool Duet Washer Error Codes: F21, F20, F9E1, E1F9 Complete Guide

Quick Answer

Whirlpool Duet washers are front-load models (WFW series) that were produced from 2003-2015 before being replaced by the current WFW lineup. Duet-specific errors: F21 (long drain - the pump filter is clogged, the #1 Duet complaint), F20 (no water detected - supply valves closed or inlet screen clogged), F02 (long drain on older Duet models, same as F21), and E1F9/F9E1 (drain motor circuit fault).

Whirlpool Duet washers are front-load models (WFW series) that were produced from 2003-2015 before being replaced by the current WFW lineup. Duet-specific errors: F21 (long drain - the pump filter is clogged, the #1 Duet complaint), F20 (no water detected - supply valves closed or inlet screen clogged), F02 (long drain on older Duet models, same as F21), and E1F9/F9E1 (drain motor circuit fault). The Duet uses a drain pump filter behind the lower front panel that catches coins, hair ties, and small items. This filter is the single most important maintenance point on the Duet. The Duet Sport and Duet Steam are sub-variants with the same error codes but slightly different part numbers. Duet diagnostic mode: press any 3 buttons in sequence (except Power) within 8 seconds, repeat the same 3-button sequence. All LEDs illuminate.

WhirlpoolWasherSeverity: medium75% DIY Success
Time to Fix
10–90 min
Difficulty
beginner
Parts Cost
—
Tools Needed
Multimeter, Screwdriver set

What Does the DUET-HUB Code Mean?

Whirlpool Duet errors: F21/F02 = pump filter clogged (lower front panel door).

Most Likely Causes

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

Electronic fault triggering Whirlpool error protection40%
Component failure detected by internal sensors24%
Control board communication fault14%
Sensor out of calibration range12%
Power surge corrupting control board memory10%

Symptoms You May Notice

  • See symptoms in detailed guide above

Can you reset a Whirlpool washer to clear the DUET-HUB code?

Unplug 60 seconds. Follow model-specific reset if available.

Tools Required for Diagnosis

MultimeterScrewdriver setFlashlight

Diagnostic Checklist

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

1

Follow the brand-specific diagnosis in the guide above

Follow the brand-specific diagnosis in the guide above. Each brand has different components and failure points.

2

Check for error codes on the display or LED pattern

3

If basic diagnosis does not reveal the cause, run the

Frequently Asked Questions

How do I find my model number?
Check the inside of the door (front-load), inside the lid (top-load), or the back/side panel for a sticker with the model and serial number.
Is it worth repairing?
If the appliance is under 8 years old and repair is under 50% of replacement cost, repair is worthwhile. Check warranty coverage first.
Can I fix this myself?
Many repairs are DIY-friendly with basic tools. Gas appliances and sealed refrigerant systems should be serviced by professionals.

Same Fix Works on These Brands

Whirlpool shares the same hardware platform with these brands. The diagnosis and repair steps are identical.

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Last verified for technical accuracy on March 15, 2026