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Error code reference

GE Range Error Code F098

Magnetron case sensor probe shorted (NTC sensor on the magnetron has failed).

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Magnetron case sensor probe shorted (NTC sensor on the magnetron has failed).

First step from the service manual

Replace NTC sensor.

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

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  • Wiring diagram references and connector pinouts from the OEM service manual
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What F098 means on a GE range

The F098 error code on a GE range indicates that the NTC (Negative Temperature Coefficient) sensor mounted on the magnetron case has developed a short circuit condition. This sensor is a thermistor responsible for monitoring the operating temperature of the magnetron, which is the component that generates microwave energy in combination ranges equipped with microwave functionality. When the sensor shorts, its resistance drops abnormally low or collapses to near zero ohms, sending an out-of-range signal to the control board that triggers this fault code.

NTC thermistors change resistance predictably as temperature changes, and the control system uses this resistance reading to ensure the magnetron does not overheat during operation. A shorted sensor produces a reading that mimics an extreme temperature condition, causing the control board to flag the fault and disable the microwave circuit as a protective measure. This is distinct from an open-circuit sensor failure, where resistance would read infinitely high.

The most direct cause is internal failure of the NTC sensor itself, where the thermistor element breaks down and creates a direct short across its terminals. Contributing factors can include prolonged heat exposure degrading the sensor material, moisture intrusion into the sensor body, or physical damage to the sensor or its wiring harness. Because the first diagnostic step is sensor replacement, technicians should verify the short is in the sensor and not in the wiring before condemning the part.

Source: manufacturer service documentation.

Common causes of F098

  1. 01

    Failed NTC thermistor sensor

    Part replacement

    The NTC sensor itself has internally shorted, causing its resistance to drop to an abnormal level. This is the most common cause and is confirmed when the sensor reads near-zero ohms across its terminals.

  2. 02

    Damaged sensor wiring harness

    Part replacement

    The wiring connecting the NTC sensor to the control board may have chafed, melted, or pinched, creating a short in the circuit before it even reaches the sensor. Inspect the harness carefully for insulation damage or contact with hot surfaces.

  3. 03

    Moisture or contamination in sensor

    Part replacement

    Grease, steam, or moisture that has entered the sensor housing can cause a short across the thermistor element. This is identifiable by residue or corrosion visible on the sensor body or connector.

  4. 04

    Heat degradation of sensor material

    Part replacement

    Extended operation over time can cause the thermistor material to break down from repeated thermal cycling, eventually leading to an internal short. Units with high usage hours are more susceptible to this type of failure.

  5. 05

    Faulty connection at sensor connector

    Wiring / connection

    A corroded or improperly seated connector at the sensor plug can cause intermittent or permanent short-circuit readings. Cleaning or reseating the connector may resolve the fault before replacing the sensor.

See the test procedure for each cause

Frequently asked questions about F098

What does F098 mean on a GE range?
F098 indicates that the NTC temperature sensor mounted on the magnetron case has shorted internally. The NTC sensor is a thermistor that monitors the magnetron's operating temperature to prevent overheating. When it shorts, the resistance collapses and sends an invalid signal to the control board, which then disables the microwave circuit and displays this code.
Can I fix the F098 error myself?
A knowledgeable DIYer can attempt this repair, but it involves working near the magnetron, which stores high voltage even when unplugged. The primary fix is replacing the NTC sensor on the magnetron case. Before replacing the sensor, you should also inspect the wiring harness for damage or shorts, as a harness problem can mimic a sensor failure.
Is it safe to use my GE range while F098 is displayed?
The microwave function will be disabled while this error is active, which is a built-in protective measure. The oven and surface burner functions may still operate depending on your model, but the appliance should be serviced before continued use. Operating a range with a known sensor fault and bypassing the safety system is not recommended.
How much does it cost to repair a GE range F098 error?
If only the NTC sensor requires replacement, parts typically range from around $15 to $60 depending on the specific model. If a technician performs the repair, total costs including labor generally fall between $100 and $250. More complex repairs involving wiring harness replacement or control board damage will push costs toward the higher end of that range.
Will resetting the GE range clear the F098 error code?
Resetting the range by cycling power may temporarily clear the code from the display, but the fault will return as soon as the control board reads the shorted sensor again. A power reset does not fix the underlying hardware failure. The NTC sensor or associated wiring must be inspected and repaired or replaced for the code to clear permanently.

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