Bosch Range Error Code F45

F45 means the control board is detecting a contradictory state from the motorized oven door latch. Specifically, the two switch contacts (A and B) that report the latch position are both reading open or both reading closed at the same time, which should not be possible during normal operation. The oven triggers this code as a safety measure because it cannot confirm whether the door is actually locked or unlocked.

Normal baking and broiling functions may still be available depending on the current state of the latch, but you should not attempt to run the self-clean cycle until the error is resolved. The latch is a safety device that seals the door during high-temperature cleaning, and operating self-clean with an unconfirmed latch position creates a burn hazard. Resolve the latch fault before using that function.

Repair costs vary depending on the failed component. A replacement latch switch or latch motor assembly typically costs between 50 and 150 dollars in parts, with labor adding 100 to 200 dollars if you use a professional technician. If the control board is the source of the fault, parts alone can range from 150 to 400 dollars or more. Diagnosing the exact failed component first can help avoid unnecessary parts replacement.

A reset may temporarily clear the code if the fault was caused by a transient latch signal issue. However, the control board is designed to wait for the oven to cool below 585 degrees F and then attempt to find the correct switch state on its own within one minute before the error becomes permanent. If the underlying latch switch or wiring problem is not addressed, the code will return the next time a self-clean cycle is started.

Start by allowing the oven to cool completely, then check the wiring harness and connectors at the latch assembly for loose pins, corrosion, or heat damage. If the wiring checks out, the latch switch assembly is the most likely component to replace. In cases where the switch and wiring are both intact, the latch motor or the control board may require further testing or replacement by a qualified technician.