Error code reference

GE Oven Error Code F34

Upper oven calibration CRC failure or difference between RTD temperature and fine tune temperature is greater…

GE codesGE oven codes

Upper oven calibration CRC failure or difference between RTD temperature and fine tune temperature is greater than 50°F.

First step from the service manual

Replace the control.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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What F34 means on a GE oven

F34 on a GE oven indicates the control board has detected an abnormal resistance reading in the oven sensor circuit. The board continuously monitors the oven temperature sensor (also called an RTD probe) by reading its resistance. When that resistance falls outside the expected thresholds, either too low or too high, the board throws F34 and typically disables the bake or broil functions. The starting point for diagnosis is measuring resistance at the control board connector, which helps determine whether the fault originates at the sensor itself, the wiring harness, or the board.

For homeowners, the oven temperature sensor is a small probe mounted inside the oven cavity, usually near the top back wall. It tells the control board how hot the oven actually is. When its resistance reads outside the normal range, the board cannot trust the temperature data, so it shuts down to prevent overheating or undercooking. This can be caused by a failing sensor, damaged wiring, or a loose connector.

Before replacing parts, check the sensor resistance with a multimeter. A typical GE oven sensor reads approximately 1080 ohms at room temperature. A reading far outside this range points to a failed sensor. If resistance at the board connector looks correct, suspect the control board itself.

Source: manufacturer service documentation.

Common causes of F34

  1. 01

    Failed oven temperature sensor

    Part replacement

    The oven temperature sensor has drifted outside acceptable resistance thresholds or failed open/short, causing the control board to trigger F34. This is the most common cause and is confirmed by measuring resistance directly at the sensor.

  2. 02

    Damaged or broken sensor wiring harness

    Part replacement

    The wiring between the oven sensor and the control board connector can crack, burn, or short due to heat exposure over time. A damaged harness produces an incorrect resistance reading at the board even when the sensor itself tests within spec.

  3. 03

    Loose or corroded connector at the control board

    Wiring / connection

    A poor connection at the control board connector where the sensor circuit terminates can cause intermittent or out-of-range resistance readings. Reseating or cleaning the connector sometimes resolves the fault without replacing parts.

  4. 04

    Faulty control board

    Part replacement

    If the sensor and wiring harness both test within spec, the control board itself may be misreading the sensor circuit. A failed input circuit on the board will produce F34 regardless of sensor condition.

See the test procedure for each cause

Frequently asked questions about F34

What does F34 mean on a GE oven?
F34 means the control board detected a resistance reading from the oven sensor circuit that falls outside normal thresholds. The oven temperature sensor produces a specific resistance value at a given temperature, and when that value is too high or too low, the board flags F34. The fault points to the sensor, the wiring harness connecting it to the board, or less commonly, the control board itself.
How do I fix F34 on a GE oven?
Start by unplugging the oven and locating the oven temperature sensor, which is mounted inside the oven cavity at the back wall. Disconnect the sensor and measure its resistance with a multimeter. A healthy GE oven sensor reads close to 1080 ohms at room temperature. If it reads significantly higher, lower, or shows open circuit, replace the sensor. If the sensor tests fine, inspect the wiring harness for burns or breaks, then check the connector at the control board for corrosion or loose pins.
Is it safe to use my GE oven when F34 is showing?
No. When F34 is active, the control board cannot reliably read oven temperature, which means the oven cannot regulate heat accurately. Using it risks overheating the cavity or cooking at uncontrolled temperatures. Do not use the oven for baking or broiling until the sensor circuit fault is diagnosed and repaired.
How much does it cost to fix an F34 error on a GE oven?
An oven temperature sensor for a GE oven typically costs between $20 and $60 for the part, making it one of the cheaper repairs if you do it yourself. A wiring harness replacement is similarly priced but more labor-intensive. If the control board is at fault, parts can range from $100 to $300 or more depending on the model. Professional labor typically adds $100 to $200 for diagnostics and installation.
Can a loose wire cause an F34 error on a GE oven?
Yes. The control board reads the oven sensor by measuring resistance through the sensor circuit, and a loose or corroded connector at the board or at the sensor probe can introduce enough resistance variation to trigger F34. Before ordering parts, unplug the oven, locate both ends of the sensor wiring harness, and firmly reseat each connector. If the error clears and does not return, a poor connection was the cause.

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