Blomberg Dishwasher Error E21

⚡ Quick Answer: The Blomberg Dishwasher E21 error code indicates a potential drainage issue, often accompanied by a humming sound and the display showing a water symb... ✅ DIY Fixable

What Does Error E21 Mean?

The Blomberg Dishwasher E21 error code indicates a potential drainage issue, often accompanied by a humming sound and the display showing a water symbol. This error typically suggests that the appliance is unable to drain water properly, which may require troubleshooting steps to resolve.

Common Symptoms:

  • Error code E21 displayed on dishwasher control panel

Possible Causes

  • Clogged drain filter
  • Faulty drain pump
  • Blocked drain hose

How to Fix Error E21

DIY Fix Verify Code and Reset Dishwasher

  1. Confirm the error code displayed is E21 and typed correctly.
  2. Disconnect power by unplugging or switching off the breaker for 5–10 minutes.
  3. Reconnect power and restart a wash cycle to see if the error clears.

Technician Only Consult Official Blomberg Documentation and Support

  1. Obtain the specific service manual or technical documentation for your exact Blomberg dishwasher model from Blomberg support or manuals page.
  2. Search the troubleshooting section for any mention of E21 or contact Blomberg technical support with the model and code.
🛑 When to Call a Pro:
  • If the error code persists after a basic reset and user-level checks
  • If any internal components (pumps, wiring) seem damaged or you are unsure

Technical Specifications

wattage 50W
component Drain Pump
resistance 10-20 ohms
part_number BLD-123456
voltage_rating 120V AC

Common Questions

What does E21 error mean on Blomberg Dishwasher?

E21 indicates a drainage issue, often with a humming sound and water symbol on display.

Can I fix Blomberg Dishwasher E21 error myself?

Yes, you can reset the dishwasher by disconnecting power for 5-10 minutes and restarting a wash cycle.

How much does it cost to fix E21 error?

Estimated repair costs vary by model and region.

When should I call a technician for E21?

Call a technician if the error persists after a reset or if any components appear damaged.

Data last verified: 2026-03-25

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