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Error Code F 03 Troubleshooting Guides
Published FixGraph guidance for diagnosing and responding to error code f 03.
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Bosch Dryer Error Code F:03 | Fix Guide
Do not treat F:03 as a universal Bosch dryer code. First record the complete E-Nr/model and region from the rating plate.
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Bosch WTE86300US/09 dryer F:03: check the condensation outlet safely
On the Bosch WTE86300US/09, F:03 is the condensation-outlet branch, not a generic lint warning. Bosch's owner manual for the WTE86300US says to check the condensation-outlet hose, while Bosch's exact service page identifies the /09 suffix as a Series 4 condenser tumble dryer.