Error code reference
Bosch Oven Error Code F143
Vcc open circuit on slave micro; bad Power Board or Display Board.
Vcc open circuit on slave micro; bad Power Board or Display Board.
First step from the service manual
Check power and Display Board connectors P1B and associated wiring.
The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.
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- Step-by-step tests with expected resistance, voltage, and continuity values
- Wiring diagram references and connector pinouts from the OEM service manual
- Verified part numbers when replacement is required
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