Jenn-Air Oven Error Code F5

The F5 error on a Jenn-Air oven indicates the control board has detected that the power element relays have been disabled during a cook cycle. The relay board (PRB) is responsible for switching power to the bake and broil elements, and when the control sees these relays drop out unexpectedly mid-operation, it throws F5 and halts cooking. The first diagnostic direction is the sensor circuit and wire harness, since intermittent connections can send false signals to the PRB that cause relay shutoff, and the PRB contact points themselves are suspect for intermittent dropout.

For homeowners, this means your oven started a cook cycle but the control board detected that power to the heating elements was cut off unexpectedly. The oven shuts down as a safety measure rather than continue in an unknown state. The heating elements themselves may be fine, the problem is often a loose wire connection, a failing sensor, or a relay board that is not maintaining solid contact. This is not always a catastrophic failure, and the repair may be as simple as reseating a connector.

Because this code is triggered by intermittent conditions, the fault may not be present every cycle, which can make diagnosis tricky. A technician will typically wiggle the wire harness while monitoring live data to catch the dropout in action.