Bosch Oven Error Code E124

Cavity 1 (upper/single) door switch error — door switch is in undefined state.

First step from the service manual

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

• EA fault code indicated by 'E' followed by a number…
• E000Wrong module code
• E003User interface electronics exceed 185°F/85°C.
• E005Communication error
• E009ROM-check error in user interface
• E010Data memory error in user interface
• E011Continuous pushing of a single key
• E012Defective user interface PCB temperature sensor.