FROM THE TROUBLESHOOTING LIBRARY
Bosch Dishwasher E03 Error Code Fix Guide
Amazon links are affiliate links. As an Amazon Associate I earn from qualifying purchases. Affiliate disclosure.
What E03 means
The Bosch US index assigns E03 to a main control-board relay fault/error. E02 and E03 share a broad published description, but they are separate displayed codes; do not merge them or assume the same failed component on every E-Nr.
Primary reference: Bosch US dishwasher error-code index.
Safe checks
- Write down E03 exactly and locate the model/E-Nr.
- Perform Bosch's limited reset: switch off the appliance, reset the breaker for 30 seconds if safe, then restore power.
- Test only once. If E03 returns, leave the dishwasher unused and book Bosch support or qualified service.
- Do not remove panels, bypass the door switch or test the relay while energized.
When to stop
Water, scorch marks, buzzing from the control area or a repeated breaker trip makes this a service issue. Keep the dishwasher isolated until it has been assessed.
Parts You Might Need
Affiliate links. These Amazon searches are for model research only, not confirmed parts. Check Bosch's E-Nr parts lookup before purchase. Read the affiliate disclosure.
As an Amazon Associate I earn from qualifying purchases.