Bosch Dishwasher Error Code E21 – Meaning and Possible Fixes
Bosch Dishwasher Error Code E21
If your Bosch dishwasher displays Error Code E21, it usually indicates that the appliance has detected a problem with the circulation pump system. The circulation pump moves water through the dishwasher’s spray arms during the wash cycle.
If the pump becomes restricted or cannot operate correctly, the dishwasher may stop the cycle and display the E21 error code.
View all Bosch dishwasher error codes.
What the E21 Error Means
The E21 error code generally indicates that the dishwasher has detected abnormal operation of the circulation pump. Bosch dishwashers monitor the pump during the wash cycle to ensure water is circulating properly.
If the pump is blocked or unable to rotate as expected, the control system may interrupt the cycle and display the E21 error.
Common Reasons This Error Appears
Debris in the pump area
Food particles, broken glass, or other debris can sometimes interfere with the pump.
Blocked filters
If the dishwasher filters are heavily clogged, water may not circulate properly.
Temporary system fault
Occasionally the dishwasher may display an error after a power interruption or electronic glitch.
Safe Checks You Can Try
Before contacting a technician, there are a few safe checks you can perform.
Clean the dishwasher filters
Remove the filters from the bottom of the dishwasher and rinse them under running water to remove debris.
Inspect the spray arms
Ensure the spray arms can rotate freely and are not blocked by dishes or utensils.
Reset the dishwasher
- Turn the dishwasher off using the power button.
- Switch off power at the wall socket or circuit breaker.
- Wait several minutes.
- Restore power and start a new wash cycle.
If You Need Spare Parts
If you’re confident carrying out the repair yourself, compatible Bosch dishwasher parts are available on Amazon with next day delivery.
Always check your model number before ordering to ensure compatibility.
When To Contact A Professional
If the E21 error continues to appear after cleaning the filters and resetting the dishwasher, the appliance may require inspection by a qualified appliance technician.
The circulation pump and internal components should only be serviced by trained professionals.
Related Bosch Dishwasher Error Codes
You may also encounter similar issues indicated by Bosch Dishwasher Error Code E20, Bosch Dishwasher Error Code E22, Bosch Dishwasher Error Code E23 and Bosch Dishwasher Error Code E24.
Error code meanings can vary slightly between Bosch models.
Always consult your appliance manual or a qualified technician if the issue persists.
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