What E312 Means
E312 means the temperature sensor built into the control module itself has failed. That sensor is what the board uses to protect its own electronics from the heat of the cavity, so without it the oven has no way to know whether the plenum is getting too hot. Bosch's response is severe and simple: all oven operations are suspended until a control reset, and the suggested action is to replace the control module.
Common Causes of E312
- Board-mounted temperature sensor failed
- Solder or trace damage around the sensor from repeated heat cycling
- Control module at the end of its service life
🔧 One Safe Check You Can Try
Try a breaker reset for two minutes, which is the reset the manual refers to. If operations return and then suspend again, the sensor is genuinely failing and the board is the documented repair.
⚠ Why You Shouldn't Go Further Than That
- This is the sensor that protects the electronics from cavity heat, so an oven running without it has lost a protection layer you cannot see.
- The sensor is surface-mounted on the module, so it is not a part that can be replaced separately in a kitchen.
- Bosch suspends all operations rather than just heating, which means there is no partial use to fall back on.
- A control module ordered without confirming the model revision is a common and expensive mistake on built-in ovens.
Opening a panel to inspect or repair something yourself doesn't automatically cancel your manufacturer's warranty — but it can risk accidental damage, and some manufacturers do have specific service conditions. Check your product's warranty terms, or ask us, before deciding.