GE Range Error Code F3x

F3x on a GE range means the temperature measurement circuit redundancy check inside the Main Logic Board has failed. This is an internal board-level fault where the control board's self-diagnostic routine has detected that its own temperature verification circuitry is not functioning correctly. It is not the same as a faulty oven temperature sensor. The indicated repair is replacement of the Main Logic Board.

Using the range while F3x is active is not recommended. The error indicates the board's internal system for verifying oven temperature accuracy has failed, meaning the control board cannot reliably confirm that temperature data is correct. This could pose a safety concern related to uncontrolled or inaccurate oven temperatures. Discontinue use until the board has been replaced.

The cost to repair an F3x error depends on whether you replace the board yourself or hire a technician. A replacement Main Logic Board for a GE range typically costs in the range of $150 to $400 or more depending on the model. If you use a professional repair service, labor charges will add to that cost, bringing the total repair estimate to roughly $250 to $600 or higher in some cases.

Resolving F3x requires replacing the Main Logic Board, which is a repair that experienced DIYers with electrical knowledge can attempt. The board must be matched to the specific range model. If you are not comfortable working with appliance control boards or disconnecting electrical components, a qualified technician should perform the replacement.

A power reset, such as unplugging the range or cycling the circuit breaker, may temporarily clear the display, but F3x is an internal board fault that will return if the underlying board circuit failure is still present. Resetting does not repair the failed redundancy check circuitry inside the board. Permanent resolution requires board replacement.