E-43Bosch Oven — Bosch Oven E-43 Error Code
Control board communication error
Severity
Critical
Difficulty
Advanced
Est. Cost
What's Happening
The main electronic control can't communicate with other oven components. This is a control board failure that prevents normal operation.
How to Fix It
Reset power at the breaker for 30 seconds. If E-43 persists, the main control board needs replacement. Professional diagnosis is recommended before replacing expensive components.
Frequently Asked Questions
What does E-43 mean on a Bosch oven?
E-43 indicates the control board has a communication error. The board can't properly manage oven functions.
How much does a Bosch oven control board cost?
Control boards typically cost $150–$350. With labor, expect $250–$500 total.
Can a power surge cause E-43?
Yes. Power surges can damage the control board's communication circuits. A surge protector on the circuit helps prevent this.