Error code reference

GE Oven Error Code F22

Lower oven temperature climbed above Error Unlock Temperature while door is not locked (thermal runaway).

GE codesGE oven codes

Lower oven temperature climbed above Error Unlock Temperature while door is not locked (thermal runaway).

First step from the service manual

Most likely at least 1 welded relay; replace the control with the welded relay.

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

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What F22 means on a GE oven

The F22 error code on a GE oven indicates that the electronic range control (ERC) has detected a resistance value outside the acceptable threshold on the lower oven sensor circuit. Specifically, the control is reading resistance across the W to W/R wire pair at CN300 pins 1 to 8 on the ERC (T012), or at J300 pins 1 to 2 on the machine control lower oven board, that exceeds the upper limit the system allows. This points to a fault in the lower oven temperature sensor (RTD probe) or its associated wiring.

For homeowners, the lower oven sensor is a small probe mounted inside the oven cavity that continuously reports temperature to the control board. When the board sees a resistance reading that is too high, it cannot trust the temperature data, so it shuts down and displays F22 rather than risk overheating or inaccurate cooking. This typically means the sensor itself has failed, or the wiring connecting it to the control board has an open or damaged section.

This code specifically affects the lower oven in double-oven configurations, or the main oven cavity in single-oven models. Because the fault is defined as resistance exceeding a threshold, a completely open circuit (broken wire or failed sensor) is the most common physical cause.

Source: manufacturer service documentation.

Common causes of F22

  1. 01

    Failed lower oven temperature sensor (RTD probe)

    Part replacement

    The sensor element inside the probe has failed open, causing resistance to exceed the acceptable range. This is the most common cause of F22 and is confirmed by measuring the sensor resistance directly at the connector pins W to W/R.

  2. 02

    Open or damaged wiring harness between sensor and control board

    Part replacement

    A broken wire, corroded connector pin, or burnt harness section between the lower oven sensor and CN300 or J300 creates an open circuit that reads as excessively high resistance. Inspect the full wire run from the sensor to the board connector for visible damage or loose pins.

  3. 03

    Poor or corroded connector contact at CN300 or J300

    Wiring / connection

    Corrosion or heat damage at the connector terminals on the ERC at CN300 pins 1 to 8, or on the machine control lower oven board at J300 pins 1 to 2, can add enough resistance to trigger the fault. Cleaning or reseating the connector may resolve this without replacing components.

  4. 04

    Faulty ERC or lower oven machine control board

    Part replacement

    If the sensor and all wiring check out within specification, the ERC or lower oven control board itself may be misreading the circuit. This is the least likely cause and should only be suspected after the sensor and harness are confirmed good.

See the test procedure for each cause

Frequently asked questions about F22

What does F22 mean on a GE oven?
F22 means the control board has detected that the resistance on the lower oven sensor circuit has exceeded the allowed threshold. The board monitors the W to W/R wire pair connected to the lower oven temperature sensor, and when resistance reads too high, it cannot reliably track oven temperature and triggers this fault. The most likely cause is a failed lower oven sensor or a break in the wiring harness leading to it.
Is it safe to use my GE oven when F22 is displayed?
No, you should not continue using the oven with F22 active. Because the control board cannot read a valid temperature from the lower oven sensor, it has no way to regulate heat accurately. Operating the oven in this condition risks uncontrolled heating or inaccurate cooking temperatures. Stop using the oven and diagnose the fault before running any bake or broil cycles.
How do I fix F22 on a GE oven?
Start by measuring the resistance of the lower oven sensor circuit at the ERC connector CN300 pins 1 to 8 (W to W/R wires), or at the machine control lower oven board connector J300 pins 1 to 2. A healthy GE oven sensor reads approximately 1080 to 1100 ohms at room temperature. If resistance is significantly higher or reads open (OL), replace the lower oven sensor. If the sensor tests good, inspect the wiring harness and connectors for damage or corrosion before considering the control board.
How much does it cost to fix a GE oven F22 error?
If the lower oven sensor is the cause, replacement sensors typically range from $20 to $60 for the part, and the repair is accessible for a confident DIYer since it usually involves removing two screws and a wire connector inside the oven cavity. If a wiring harness or control board is at fault, parts cost rises to $50 to $300 or more depending on the board, and professional labor adds $100 to $200 in most markets. Diagnosing the sensor resistance first keeps unnecessary parts costs down.
Can I test the lower oven sensor myself to diagnose F22?
Yes. Disconnect power to the oven, then pull the sensor connector at either the ERC (T012) at CN300 pins 1 to 8 or the lower oven board at J300 pins 1 to 2 and measure resistance across the W and W/R wires using a multimeter set to ohms. At room temperature, a good sensor reads roughly 1080 to 1100 ohms. A reading well above this range or an open circuit (OL) confirms the sensor has failed and needs replacement.

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