Bosch Oven Error Code E302
A sensor on the control module watches the electronics' temperature, and E302 means it passed the limit — most often because the cooling fan is failing, which is also why this code loves to appear during self-clean. The oven protects itself: elements off, fan to high, and heating resumes when things cool.
Common causes
- Cooling fan failed or blocked, so heat builds up around the electronics
- Cabinet ventilation slots blocked
- Failed cooling fan combined with a long self-clean cycle
What to check, in order
- Let the oven cool: the control switches the elements off, runs the fan at high speed, and clears the error itself once the cavity is back near 212°F/100°C.
- While it cools, listen for the cooling fan running at high speed; a silent fan during E302 explains the overheating.
- Check the cabinet vents are open and nothing has been stored against them.
- If E302 returns in normal cooking (not just self-clean), the cooling fan is the prime suspect and needs a technician. Note: self-clean stays disabled until a control reset after this fault.
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
Most cases are solved by the checks above. Book a technician 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 E302, your model number (on a label inside the door or on the back) and the checks you already ran. It shortens the visit.
Parts that may be involved
Cooling fan motorControl 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 E302
What does E302 mean on a Bosch oven?
E302 means: Control module too hot — electronics over temperature. A sensor on the control module watches the electronics' temperature, and E302 means it passed the limit — most often because the cooling fan is failing, which is also why this code loves to appear during self-clean. The oven protects itself: elements off, fan to high, and heating resumes when things cool.
Can I fix Bosch E302 myself?
Start yourself: the checks on this page cover the causes you can reach without opening the machine up. If they point to a faulty part, testing or replacing it is usually a technician job.
How do I clear Bosch E302?
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.