Bosch Range Error Code F111

F111 indicates an oven runaway condition, meaning one or more cycle relays on the power board are stuck in the closed position while the oven control is idle or in its home state. This causes the heating element to receive continuous power even when no bake or broil cycle has been commanded. The control detects this unintended heating activity and displays F111 as a protective fault to alert the user.

Resetting the control or cycling power will not clear F111 if the underlying cause is a physically welded relay, because the relay remains stuck regardless of what the control commands. The fault will return as soon as the control detects that heating is occurring in an idle state. A proper repair, typically replacement of the power board, is required to resolve the condition.

Repair costs depend on which component has failed. If only the oven temperature sensor needs replacement, costs are generally lower, typically in the range of $100 to $250 including labor. If the power relay board requires replacement, costs can range from $200 to $450 or more depending on the specific model and local labor rates. Obtaining a diagnosis before ordering parts is recommended to avoid unnecessary expenses.

No, the oven should not be used while F111 is active. A stuck relay means the heating element may run without any temperature limit or control, creating a potential fire or burn hazard. The oven should be turned off and the circuit breaker should be opened until the relay board and sensor have been properly diagnosed and repaired.

Start by checking the double line breaker at the electrical panel for a tripped leg. Next, inspect the oven temperature sensor connection at the relay board and measure the sensor's resistance at its connector to the chassis, looking for approximately 1100 ohms at room temperature and confirming there is no open circuit. If the sensor checks out, the cycle relay on the power board is the most likely cause and the relay board will need to be replaced. This repair typically requires a qualified appliance technician.