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error Bosch
Error Code F04
A problem with the lock occurred in the oven.
? What Causes This
Lock mechanism failure or electronic detection of lock problem.
✓ How to Fix It
Turn power off and turn it back on again after a few seconds. The oven should run a latch auto-test. If condition persists, note the code number and call an authorized servicer.
Source: page 22 of the official manual
From the manual
This error code appears in:
Bosch 5000 Series Wall Ovens