Skip to main contentStart diagnosing 21 on your Wascomat washer
What this code means
Drain valve/pump. Possible causes: Drain pump failure; Drain valve malfunction; Drainage blockage
Next steps: diagnose the root cause
1
Verify the error code is active
Power cycle the unit and see if the code returns. If it does, the fault is persistent and requires diagnosis.
2
Get the full diagnostic procedure
Get step-by-step guidance, test values, and wiring diagrams from the OEM service manual.
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What’s available for Wascomat washer models
Access Wascomat washer service manuals, wiring schematics, exploded parts views, and error code references on MyPros+.