Bosch Range Error Code E312

The E312 error code on a Bosch range indicates that the control module's internal temperature sensor has failed or is producing readings outside acceptable parameters. This sensor monitors the temperature of the control board itself, protecting the electronics from thermal damage during oven operation. When the control module detects that this sensor is defective, it immediately suspends all oven functions as a protective measure to prevent potential damage to connected components.

The control module temperature sensor is integrated directly into the control board assembly, meaning it cannot be serviced or replaced independently from the board itself. A failure of this sensor can stem from a few root causes: physical damage to the sensor circuit on the board, thermal stress from repeated heating and cooling cycles, a short circuit within the board's internal sensor loop, or component degradation over time. Because the sensor is embedded in the control module, there is no separate sensor component to test or swap out.

Bosch's diagnostic approach for E312 points directly to control module replacement as the corrective action. All oven operations, including baking, broiling, and convection functions, remain disabled until the control is either reset or replaced. A reset may temporarily clear the code, but if the underlying sensor fault persists, the error will return. Technicians should verify the code is not caused by external wiring issues to the board before committing to a full control module replacement.