Error code reference

GE Oven Error Code F30

Upper oven sensor circuit fault related to oven sensor resistance thresholds.

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Upper oven sensor circuit fault related to oven sensor resistance thresholds.

First step from the service manual

Check resistance of oven sensor circuit on ERC (T012) at CN300 pin 1 to 3 W to W/BK, or on Machine Control board connector J300 pins 1 to 2 W to W/BK.

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

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What F30 means on a GE oven

The F30 error code on a GE oven indicates that the Electronic Range Control (ERC) has detected a fault in the upper oven sensor circuit. Specifically, the control board is reading resistance values outside the acceptable thresholds for the oven temperature sensor (RTD sensor). The fault is confirmed by checking the sensor circuit resistance at connector CN300 pins 1 to 3 (W to W/BK) on the ERC, or at connector J300 pins 1 to 2 (W to W/BK) on the Machine Control board.

For homeowners, the oven temperature sensor is a small probe mounted inside the oven cavity that constantly reports the interior temperature to the control board. When the control board receives a resistance reading that is too high or too low, it cannot accurately regulate oven temperature and triggers F30 to prevent unsafe operation. This could mean the sensor itself has failed, the wiring connecting it to the board has broken or shorted, or the connector has corroded or come loose.

Because the oven cannot verify its own temperature with this fault active, baking and broiling functions will typically be disabled or unreliable until the issue is resolved. Checking resistance at the specified connectors is the first step to isolating whether the fault is in the sensor, the wiring harness, or the control board itself.

Source: manufacturer service documentation.

Common causes of F30

  1. 01

    Failed upper oven temperature sensor (RTD)

    Part replacement

    The oven sensor probe itself has drifted out of its specified resistance range or failed open or short. A properly functioning GE oven sensor reads approximately 1080 ohms at room temperature, and readings far outside this value confirm the sensor has failed.

  2. 02

    Damaged or broken wiring harness between sensor and control board

    Part replacement

    The wires running from the upper oven sensor to connector CN300 or J300 can develop breaks, burns, or shorts due to heat exposure inside the oven cavity. A broken wire will cause the resistance reading at the connector to read open or infinite, triggering F30.

  3. 03

    Loose or corroded connector at CN300 or J300

    Wiring / connection

    The W to W/BK wire connection at CN300 pin 1 to 3 on the ERC or J300 pins 1 to 2 on the Machine Control board can loosen or corrode over time, causing an intermittent or absent signal from the sensor circuit.

  4. 04

    Faulty ERC or Machine Control board

    Part replacement

    If the sensor and wiring harness both test within specification at the connectors, the control board itself may have failed and is misreading the sensor circuit resistance. This is the least common cause but is possible if all other components check out.

See the test procedure for each cause

Frequently asked questions about F30

What does the F30 error code mean on a GE oven?
F30 means the control board has detected that the upper oven sensor circuit resistance is outside the acceptable threshold. The sensor, also called an RTD probe, sends resistance readings to the board to report oven temperature. When those readings are too high or too low, the board cannot control temperature accurately and locks out the oven with the F30 code.
How do I fix the F30 error code on my GE oven?
Start by checking the resistance of the sensor circuit at connector CN300 pins 1 to 3 (W to W/BK) on the ERC, or at J300 pins 1 to 2 on the Machine Control board. A working GE oven sensor reads around 1080 ohms at room temperature. If the reading is open, shorted, or significantly off, disconnect the sensor leads at the oven cavity and test the sensor directly to determine whether the fault is in the sensor or the wiring harness. Replace whichever component tests out of range.
Can I still use my GE oven when it shows the F30 code?
No, you should not rely on the oven for cooking while F30 is active. Because the control board cannot verify the oven temperature, it cannot regulate heat accurately, which creates both a food safety risk and a potential burn or fire hazard. Resolve the sensor circuit fault before using the oven for baking or broiling.
How much does it cost to fix an F30 error on a GE oven?
If the upper oven sensor is the cause, replacement sensors typically cost between $20 and $60 for the part, and the repair is manageable as a DIY job since it usually involves two screws and a wire connector inside the oven cavity. If the wiring harness is damaged, parts cost is similar but routing new wires adds time. A failed ERC or Machine Control board is the most expensive scenario, with boards ranging from $100 to $300 or more depending on the model, and professional labor typically adds $100 to $200.
How do I test the oven sensor to diagnose the F30 code on a GE oven?
Set a multimeter to measure ohms and disconnect the sensor wiring connector inside the oven cavity or at the control board connector CN300 or J300. Measure resistance across the two sensor leads. At room temperature, a good GE oven sensor reads approximately 1080 ohms. A reading of zero ohms indicates a short, while an open line (OL or infinite resistance) indicates a broken sensor or wire. Either condition will cause F30 and requires replacing the faulty component.

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