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Dishwasher troubleshooting · E21

Bosch Dishwasher E21 — Blocked Heat Pump Support

Bosch E21: check the manufacturer meaning, model and market limits, and when to contact support. No model-specific repair is established.

What E21 means

Bosch US describes E21 as a blocked heat pump. This is not a diagnosis of a failed drain pump. The entry does not provide a pump-removal or blockage-clearing procedure.

What Bosch recommends

The Bosch US E21 entry lists a 30-second power reset at the breaker, followed by Bosch support if the problem remains. Read the section headed Error Code E21; instructions for neighboring codes are different.

Use the documentation for your exact appliance to confirm applicability. If you cannot identify the correct breaker or are unsure how to follow the instruction safely, ask Bosch support before attempting it. This guide provides no procedure for opening an electrical panel, testing live circuits or dismantling the dishwasher.

When to seek support

If the error remains, contact Bosch through the source page. Have your model number and exact displayed code ready. The source does not establish a repair price, time estimate, replacement part or guarantee that a reset fixes the underlying fault. Do not use a drain-pump replacement checklist as a diagnosis of this code.

Limits of this guide

This review covers the cited US entry only. It does not certify your appliance or establish a repair for every model. For a different market or code format, use the corresponding Bosch documentation and support service.

Sources and review scope

Reviewed . Codex editorial review of the exact Bosch US E21 entry; no physical appliance testing or model-specific repair certification.