A Bosch oven temperature is inaccurate; food is undercooked or overcooked compared to the set temperature.

Safety first: Allow the oven to cool before placing or removing thermometers.

• Verify with thermometer: Place an oven thermometer in the center of the oven and compare actual temperature to the setpoint over several cycles.
• Adjust calibration: Many Bosch ranges allow temperature offset adjustment in the settings menu. Adjust by small increments (e.g., ±15°F / ±10°C).
• Inspect sensor: If readings are erratic, test the oven temperature sensor resistance and replace if out of spec.
• Check door gasket: Inspect the oven door gasket for gaps or tears and replace if leaking heat.