GE Range Error Code F4 E7

The F4 E7 error code on a GE range indicates an over-temperature condition in cavity 2, specifically classified as a temperature runaway error. This means the control board has detected that the second oven cavity is exceeding safe temperature thresholds without the ability to regulate itself back down. Temperature runaway occurs when the heating system continues to add heat beyond the setpoint, which the control board monitors through temperature sensor feedback. When the sensor data shows temperatures climbing uncontrollably or remaining dangerously elevated, the board triggers this fault to protect the appliance and surrounding cabinetry.

The most direct diagnostic entry point is entering the range's diagnostics mode and pressing the BAKE key to cycle the bake relay on and off. This step isolates whether the relay itself is sticking in the closed position, which would cause continuous heating regardless of the control board's commands. A relay stuck closed will keep power flowing to the bake element even when the board attempts to shut it off, producing exactly the runaway condition described by this code.

Beyond a failed relay, a faulty oven temperature sensor (RTD probe) in cavity 2 can send incorrect resistance readings to the control board, causing the board to misinterpret the actual oven temperature and allow excessive heating. The control board itself may also be at fault if it is sending continuous voltage to the bake circuit without command. Identifying which component is responsible requires systematic testing of the relay, sensor resistance, and board output signals.