Bosch Range Error Code F10

The F10 error code on a Bosch range indicates a runaway temperature condition, meaning the control board has detected that the oven temperature has climbed beyond safe operating limits. The oven temperature sensor (also called a probe or RTD sensor) communicates oven heat levels to the control module through changes in electrical resistance. As the oven heats up, sensor resistance rises in a predictable way. When the control detects resistance values that are higher than expected for normal operation, it interprets this as an abnormally high internal temperature and triggers the F10 fault.

The most dangerous aspect of F10 is what it implies about the heating element circuit. Under normal operation, the control module cycles the bake or broil element on and off to maintain the set temperature. When the oven overheats and F10 is triggered, it often means the element is not shutting off as commanded, which points to a failed relay on the control board. A relay that is stuck in the closed position will allow continuous current to flow to the element regardless of the control signal, causing temperature to climb unchecked.

Diagnosing F10 correctly requires separating two possible failure points: the sensor itself and the control board. A faulty sensor with drifted resistance can mimic an overtemperature condition even when the oven is not actually too hot. However, if the oven is confirmed to be genuinely overheating, the wiring harness and sensor should be inspected first, and if those check out, the control module must be replaced. Leaving a runaway heating circuit unaddressed is a fire hazard and requires immediate attention.