Error code reference

Maytag Washer Error Code 21

Sensor switch failure on machine control board - door sensor switch detected as open and door lock switch detected as locked.

SourceMaytag Neptune MAH6500 Front-Load Washer - Tech Sheetp. 11

Maytag codes Maytag washer codes

Diagnostic procedure

The full 21 procedure

Step 1 is visible so you can confirm you are on the right page. The remaining steps, the ones that tell you whether to actually replace a part, unlock with any pass.

MyPros+ · DiagnosticsStep 1 preview

First diagnostic step

Access Door Lock Verification, page 6.

SourceMaytag Neptune MAH6500 Front-Load Washer - Tech Sheetp. 11

Unlock with pass

More steps, wiring diagram references, and verified part numbers

Includes expected resistance and voltage values, connector pinouts, and supersession notes for replacement parts.

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Where this code is documented

7 manuals in the MyPros+ library document this code for Maytag washer.

Models covered by the manuals that document this code

More models are covered than are listed here.

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The full 21 procedure

Where this code is documented

Models covered by the manuals that document this code

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