Bosch Dishwasher Error Codes: Complete Reference Guide
Bosch dishwashers display error codes to help diagnose problems. This reference explains each code and appropriate responses.
Service Team
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E01 - Water Heating Error
This code indicates the dishwasher cannot heat water to the required temperature. The heating element or temperature sensor may have failed.
Check that water supply temperature is adequate. If hot water supply is cold, this can trigger the error.
Persistent E01 codes require professional diagnosis of the heating system.
E09 - Heating Element Failure
Similar to E01 but specifically indicating the heating element itself has failed. This requires professional replacement.
Do not attempt to continue using the dishwasher without heat as dishes will not be properly sanitized.
E15 - Water in Base
The most common Bosch error, E15 indicates water has leaked into the base of the dishwasher, triggering the flood protection switch.
Check for obvious leaks around the door or inlet hose. Tilting the unit slightly may allow water to drain from the base.
Persistent E15 codes indicate ongoing leaks requiring professional repair.
Pro Tips
- Turn off water supply immediately when E15 appears
- Check for pooled water beneath the dishwasher
- Door seal damage is a common cause
E22 - Filter Blockage
This code indicates restricted water flow due to a clogged filter. Remove and clean all filter components thoroughly.
Arizona hard water can accelerate filter clogging. More frequent cleaning may be needed.
E24/E25 - Drain Problems
These codes indicate the dishwasher cannot drain properly. Check for kinked drain hose, clogged filter, or blocked disposal connection.
If the garbage disposal has a dishwasher connection, ensure the knockout plug was removed during installation.
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