Bosch Oven Error Code F45
The latch reports its position with switches, and F45 means the control is seeing 'locked' and 'unlocked' together — an impossible state that points to the switch pack or its wiring rather than the motor. The oven will not start a cycle while the control cannot tell whether the door is locked.
Common causes
- Latch position switch worn or stuck
- Latch mechanism caught halfway between positions
- Switch wiring loose or shorted
- Control board misreading the switch inputs
What to check, in order
- Cancel any cycle and reset the oven at the breaker for a minute; on power-up the latch usually drives to a defined position and the code may clear.
- Open and close the door and check it sits squarely; a dropped door can leave the latch between positions.
- Try starting and cancelling a self-clean once to run the latch through its travel.
- The switches are inside the latch assembly and are tested with a meter — if F45 returns, book a technician to test or replace the assembly.
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 F45, 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
Door latch assemblyLatch switch
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 F45
What does F45 mean on a Bosch oven?
F45 means: Oven door latch switches defective — latch reads locked and unlocked at the same time. The latch reports its position with switches, and F45 means the control is seeing 'locked' and 'unlocked' together — an impossible state that points to the switch pack or its wiring rather than the motor. The oven will not start a cycle while the control cannot tell whether the door is locked.
Can I fix Bosch F45 myself?
Only the preliminary checks. Code F45 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 F45?
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.