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Error code reference

GE Range Error Code F3 E4

Bottom oven sensor open (bottom/lower oven sensor open).

GE codesGE range codes

Bottom oven sensor open (bottom/lower oven sensor open).

First step from the service manual

Unplug range or disconnect power, open back panels and verify the temperature sensor is plugged in.

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

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What F3 E4 means on a GE range

The F3 E4 error code on a GE range indicates that the bottom oven temperature sensor circuit is open. An open circuit means the control board is detecting no continuity through the sensor circuit, which prevents it from reading any temperature data from the lower oven cavity. The control board continuously monitors the resistance values sent by the temperature sensor, and when it receives a signal that falls outside the expected range due to a broken circuit, it halts normal oven operation and displays this fault code.

The bottom oven temperature sensor is a resistance-based device, typically a negative temperature coefficient (NTC) type, that changes its electrical resistance in response to heat. Under normal operating conditions, the sensor should read a specific resistance value at room temperature (commonly around 1080 to 1100 ohms at 75 degrees F for GE sensors). An open circuit reading means the resistance has gone to infinity, indicating a broken wire, failed sensor, or disconnected plug somewhere in the circuit between the sensor and the control board.

The most common causes include a physically disconnected sensor harness connector at the back of the oven cavity or at the control board, a damaged sensor probe that has developed an internal break, or wiring that has been pinched, burned, or corroded along the harness run. Because the sensor is located in the lower oven, it is exposed to high heat cycles repeatedly, which accelerates wear on both the sensor element itself and the insulation on the wiring leading to it.

Source: manufacturer service documentation.

Common causes of F3 E4

  1. 01

    Disconnected sensor harness connector

    Wiring / connection

    The wiring connector at the temperature sensor or at the control board may have worked itself loose. Check both connection points by unplugging the range, removing the back panel, and firmly reseating the connectors.

  2. 02

    Failed bottom oven temperature sensor

    Part replacement

    The sensor probe itself may have developed an internal open circuit due to repeated heat cycling. Testing the sensor with a multimeter across its two terminals should show a resistance near 1080 to 1100 ohms at room temperature; an infinite reading confirms the sensor has failed.

  3. 03

    Damaged or broken sensor wiring harness

    Part replacement

    The wiring between the sensor and the control board can become pinched, burned near a heating element, or cracked from heat exposure over time. Inspect the full length of the harness for visible damage, charring, or broken insulation.

  4. 04

    Corroded or burned connector terminals

    Part replacement

    Even if the connector is physically attached, terminal pins inside the connector housing can corrode or burn, creating an open circuit. Inspect the terminals closely for discoloration, pitting, or residue that could interrupt continuity.

  5. 05

    Faulty control board

    Part replacement

    If the sensor and all wiring test correctly but the fault code persists, the control board may have a damaged input circuit that cannot read the sensor signal. This is the least likely cause and should only be considered after all other components have been ruled out.

See the test procedure for each cause

Frequently asked questions about F3 E4

What does F3 E4 mean on a GE range?
F3 E4 on a GE range means the control board has detected an open circuit in the bottom oven temperature sensor. This tells the oven that it cannot receive any temperature readings from the lower oven cavity. The oven will typically stop operating until the fault is resolved. The issue is usually a disconnected wiring connector, a broken sensor, or damaged wiring in the sensor circuit.
Can I fix F3 E4 myself or do I need a technician?
Many homeowners and DIYers can resolve F3 E4 by unplugging the range, removing the back panel, and checking that the sensor connector is firmly plugged in at both ends. If the connector is secure, testing the sensor with a multimeter to check its resistance value is the next step, and replacing the sensor is a straightforward repair. If the wiring harness is burned or the control board is suspected, professional service is recommended.
Is it safe to use my GE range while F3 E4 is displayed?
It is not safe to use the bottom oven while F3 E4 is active. Because the control board cannot monitor temperature, it has no way to regulate the heat level in the lower oven cavity. Continued use could result in uncontrolled overheating. Avoid using the bottom oven until the sensor issue is diagnosed and repaired.
Will resetting the range clear the F3 E4 error code?
Unplugging the range or turning off its circuit breaker for a few minutes may temporarily clear the F3 E4 code, but the code will return as soon as the control board re-scans the sensor circuit and detects the open circuit again. A reset does not fix the underlying problem. The sensor, its wiring, and the connectors must be physically inspected and repaired or replaced.
How much does it cost to fix a GE range F3 E4 error?
If only a connector needs to be reseated, there may be no parts cost at all. A replacement bottom oven temperature sensor typically costs in the range of $20 to $60 for the part depending on the model. If a technician is needed for diagnosis and repair, labor charges generally add $75 to $150 or more depending on your location. Control board replacement, if required, is significantly more expensive and can range from $150 to $400 or higher for parts alone.

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