Bosch
SHU9915 UC/11
Dishwasher
Bosch SHU9915 UC/11 — Error Code E21
Bosch SHU9915 UC/11 error code E21: Drain pump malfunction.
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Methodology: We combine manufacturer references with recurring service patterns, then review for safe, step-by-step repair guidance.
Sources: Manufacturer fault-code sheets, service manuals, and recurring field-repair patterns.
Limits: Guidance is informational and may not match every model-year or revision. Confirm with the official manual and diagnostics before replacing parts. For safety-critical or electrical work, use a qualified technician.
Looking for the full diagnosis and repair guide? View complete Bosch Dishwasher error code E21 guide →
Repair guidance: the symptoms and steps below come from the canonical Bosch Dishwasher E21 guide and apply to SHU9915 UC/11 unless your manual says otherwise.