Bosch Oven Error Code F45

F45 means the oven's control board is receiving contradictory signals from the door latch position switches simultaneously, indicating both a locked and unlocked state at the same time. This is an impossible condition that the oven's safety logic cannot accept, so it halts operation and displays the fault code. The problem typically originates in a jammed latch mechanism, a failed switch, a wiring fault, or a loose P4 connector on the Power Board.

No, you should not attempt to use the oven while F45 is active. The error indicates the control board cannot confirm the actual state of the door latch, which is a critical safety component, particularly during self-clean cycles where the door must be securely locked. Continued use could pose a burn or fire risk.

Repair costs vary depending on the faulty component. Cleaning a jammed latch or reseating the P4 connector costs little beyond your time. Replacing one or both latch switches typically involves parts in the range of $20 to $80 depending on the specific assembly. A Power Board replacement is the most expensive scenario, with parts and labor potentially ranging from $200 to $450 or more. Getting a professional diagnosis first can help avoid replacing parts unnecessarily.

Some causes of F45 are accessible to a knowledgeable DIYer. Checking and reseating the P4 connector on the Power Board, clearing debris from the latch mechanism, and inspecting the wiring harness for visible damage are reasonable starting points. Testing individual latch switches for proper continuity requires a multimeter and basic electrical knowledge. Replacing the Power Board is a more advanced repair that many DIYers prefer to leave to a technician.

A power reset by switching off the circuit breaker for several minutes may temporarily clear the F45 code, but it will return if the underlying mechanical or electrical fault is not repaired. The reset does not fix a jammed latch, a failed switch, or a damaged connector. A permanent fix requires diagnosing and correcting the root cause.