Bosch Oven Error Code E312
The sensor that lets the control module watch its own temperature (the one behind E302/E303) can itself fail — that is E312. Because the module can no longer trust its thermal protection, it suspends all oven operation until a control reset, and the remedy is a new module.
Common causes
- Temperature sensor on the control module's circuit board failed
- Control module overheating damage to the sensor
- Control module failure
What to check, in order
- Reset the oven at the breaker once the oven is fully cool; all operation stays suspended until a reset succeeds.
- If E312 returns on a cold oven, the board's own temperature sensor has failed rather than the oven genuinely overheating (compare E302/E303, which clear on cooling).
- There is nothing user-serviceable behind this code.
- Book a technician: the manual's remedy is a control module replacement.
Clear the code and test
- Fix what the checks above found first. Clearing the code without fixing the cause only brings it back.
- Plug the appliance back in and restore its water supply if it has one.
- Run the shortest programme and watch the point where the code appeared before.
- If the programme finishes with no code, the fault is cleared. If the code returns, write it down before calling a technician — it speeds up the diagnosis.
When to call a professional
This code usually points to a faulty part, wiring or the control board on a Bosch oven. Run the checks above to rule out the simple causes, then book a technician — and book one straight away if any of these apply:
- The code comes back after you have run the checks and a test cycle.
- You smell burning, see sparks or scorch marks, or the breaker trips.
- Water is leaking and you cannot stop it at the tap.
- The fix needs panels opened beyond what your manual describes, or a part tested with a meter, and you are not set up for that.
When you call, give the brand, the code E312, your model number (on a label inside the door or on the back) and the checks you already ran. It shortens the visit.
Repair or replace?
This fault is in professional territory: the fix usually means a major part or board-level work, and the labour adds up. If your machine is already well into its service life, get the repair quote first, then compare it with the price of a current equivalent model before you decide. Paying a large share of a new machine's price to repair an old one is rarely the better deal; replacing a machine over one cheap fault is wasteful too.
Parts that may be involved
Control module
Parts are model-specific. Find your model number first — usually on a label inside the door, on the door frame or on the back — and match the part to that number before ordering.
Questions people ask about E312
What does E312 mean on a Bosch oven?
E312 means: Defective control module temperature sensor. The sensor that lets the control module watch its own temperature (the one behind E302/E303) can itself fail — that is E312. Because the module can no longer trust its thermal protection, it suspends all oven operation until a control reset, and the remedy is a new module.
Can I fix Bosch E312 myself?
Only the preliminary checks. Code E312 usually means a part, wiring or the control board has failed, which is a technician job. Run the checks to rule out simple causes before you book.
How do I clear Bosch E312?
Fix the cause first — clearing the code on its own brings it straight back. Then restore power and water, run the shortest programme, and watch the stage where the code appeared. If the programme finishes with no code, it is cleared.
Sources checked
- Bosch Home (US) owner support: dishwasher error codes
- Coolblue advice: Bosch and Siemens washing machine errors
The meaning and checks for this code were checked against the sources above in November 2026. Codes vary by model and region; if your manual lists a different meaning for your exact model, follow the manual.