Bosch Dishwasher E21 error
ErrorE21
E21 is identified by Bosch support as a dishwasher circulation-pump condition. Follow the official, model-scoped checks and service boundary below.
✓
Reference source listed as Bosch US official home-appliance error-code support.
Open official source ↗What the code means
a dishwasher circulation-pump condition
Isolate the appliance when safe. Do not test the pump live; isolate the appliance when safe and arrange Bosch service. Do not open fixed panels or test live circuits.
Typical symptoms
01E21 appears on the dishwasher display
02The affected function may stop, pause, or behave abnormally
03The code returns when the same model-specific condition remains active
Likely causes
Start with the least invasive explanation and stop if the check requires internal electrical or sealed-system access.
01a dishwasher circulation-pump condition
02Confirm the exact model against Bosch's official instructions
Safe next steps
- 1Record the complete E21 display and the full Bosch dishwasher model
- 2Confirm that the displayed code matches the linked official Bosch source
- 3Do not test the pump live; isolate the appliance when safe and arrange Bosch service.
- 4Stop and arrange model-specific service if E21 returns
Step-by-step repair
- 1Do not test the pump live; isolate the appliance when safe and arrange Bosch service. No internal component replacement is verified from E21 alone.
Repair details
€Estimated cost
The published checks normally need no replacement part. Internal repair cost is model- and region-specific; obtain a written Bosch service quote after diagnosis.
The published checks normally need no replacement part. Internal repair cost is model- and region-specific; obtain a written Bosch service quote after diagnosis.
⏱Estimated time
External checks take about 5–30 minutes; professional diagnosis and repair time depend on the exact model.
External checks take about 5–30 minutes; professional diagnosis and repair time depend on the exact model.
🔧Tools
Exact Bosch model number and official manual, No internal electrical test tool is permitted
Exact Bosch model number and official manual, No internal electrical test tool is permitted
▣Spare parts
No replacement part is confirmed by E21 alone. Confirm the exact model, failed component, and manufacturer part number before ordering.
No replacement part is confirmed by E21 alone. Confirm the exact model, failed component, and manufacturer part number before ordering.
What not to do
- Do not open fixed panels, test live electrical or sealed-system parts, bypass safety devices, or order a component solely from E21.
Preventive maintenance
- 1Keep user-accessible filters, spray arms, seals, water connections, and the drain path maintained according to the exact model manual.
Frequently asked questions
What does E21 mean?
Bosch identifies it as a dishwasher circulation-pump condition.
Can I replace a part from the code alone?
No. Confirm the exact model and manufacturer diagnosis first.
Did this fix your appliance?
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