Bosch Washing Machine Error E21

⚡ Quick Answer: The Bosch washing machine error E21 indicates a drainage issue, typically due to a blockage or malfunction in the drain system. This error occurs when... ✅ DIY Fixable

What Does Error E21 Mean?

The Bosch washing machine error E21 indicates a drainage issue, typically due to a blockage or malfunction in the drain system. This error occurs when the machine cannot properly drain water, resulting in the washing machine stopping mid-cycle and water remaining in the drum. Common causes include a clogged or faulty drain pump, a blocked filter, or a kinked drain hose. Regular maintenance and inspections can prevent this problem.

Common Symptoms:

  • Washing machine stops mid‑cycle and displays E21
  • Water remains in the drum and does not drain
  • Pump/filter area may exhibit debris or blockage indications

Possible Causes

  • Blocked or kinked drain hose or system (medium)
  • Clogged or faulty drain pump or filter (medium)

How to Fix Error E21

DIY Fix Check and clear drain hose and filter

  1. Unplug the washing machine.
  2. Inspect and straighten the drain hose at the back; ensure it’s not kinked or obstructed.
  3. Access the drain pump filter (usually via lower front panel), remove debris and rinse the filter.
  4. Reconnect hose and filter, then run a short drain cycle to test.

Technician Only Inspect and service drain pump and related components

  1. Disconnect power and water.
  2. Remove access panels to reach the drain pump and check for foreign object blockage or impeller damage.
  3. Test the drain pump’s electrical function and replace if faulty.
  4. Verify correct installation and seating of drain hose and clamps.

Parts needed: drain pump, drain pump filter, drain hose

🛑 When to Call a Pro:
  • If water continues to remain after clearing blockages and basic checks.
  • If unusual noises occur during drainage indicating mechanical failure.
  • If the error persists despite cleaning and pump inspection.

Technical Specifications

wattage 50W
component Drain Pump
resistance 10-20 ohms
part_number Bosch 00619819
voltage_rating 120V AC

Common Questions

What does E21 error mean on bosch washing machine?

E21 error indicates a drainage fault, causing the machine to stop mid-cycle with water remaining in the drum.

Can I fix bosch washing machine E21 error myself?

Yes, check and clear the drain hose and filter by unplugging the machine, inspecting the hose, and cleaning the filter.

How much does it cost to fix E21 error?

The estimated repair cost for fixing the E21 error ranges from ¥5,000 to ¥15,000, depending on the model and region.

When should I call a technician for E21?

Call a technician if water remains after clearing blockages, if you hear unusual noises during drainage, or if the error persists.

Sources & References

Data last verified: 2026-01-16

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