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Error code reference

GE Range Error Code F91

Main Logic Board internal touch key chip signal error.

GE codesGE range codes

Main Logic Board internal touch key chip signal error.

First step from the service manual

Replace Main Logic Board.

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

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What F91 means on a GE range

The F91 error code on a GE range indicates an internal touch key chip signal error originating within the Main Logic Board. The touch key chip is an integrated circuit embedded on the logic board that processes capacitive or resistive input signals from the control panel's touch interface. When this chip fails to produce or receive valid signals, the board's internal diagnostics detect the fault and trigger the F91 code. This is a self-contained failure within the board's circuitry rather than a wiring or external sensor issue.

Because the touch key chip is soldered directly onto the Main Logic Board, it is not a separately serviceable component. There is no external wiring harness, thermistor, or sensor involved in this particular fault. The error is generated by the board itself recognizing that its own internal communication or signal processing related to the touch interface has broken down. This makes field-level repair of the chip itself impractical.

The recommended diagnostic path goes directly to replacement of the Main Logic Board. Attempting to troubleshoot external wiring or control panel overlays is unlikely to resolve this code, since the fault is internal to the board's integrated circuitry. Power cycling the range may temporarily clear the code in some cases, but the underlying hardware fault will typically cause the error to return. Board failure of this type can result from age-related component degradation, voltage spikes, or moisture exposure affecting the chip's circuitry.

Source: manufacturer service documentation.

Common causes of F91

  1. 01

    Failed Main Logic Board touch key chip

    Part replacement

    The touch key chip integrated into the Main Logic Board has malfunctioned internally. Since this chip is not separately replaceable, the entire board must be replaced.

  2. 02

    Voltage spike or power surge damage

    Part replacement

    A power surge can damage sensitive integrated circuits on the logic board, including the touch key chip. If the F91 code appeared after a power event, board-level damage is likely.

  3. 03

    Moisture or contamination on the logic board

    Part replacement

    Moisture or grease contamination reaching the Main Logic Board can cause signal errors in the touch key chip circuitry. Inspect the board for visible corrosion or residue if accessible.

  4. 04

    Age-related component degradation

    Part replacement

    Over time, solder joints and chip components on the logic board can degrade and fail. This type of failure tends to appear on older units and will not resolve without board replacement.

See the test procedure for each cause

Frequently asked questions about F91

What does F91 mean on a GE range?
F91 on a GE range indicates a Main Logic Board internal touch key chip signal error. The touch key chip, which is integrated directly onto the control board, is producing an invalid or missing signal. This is an internal board fault and the Main Logic Board will need to be replaced to resolve it.
Can I fix the F91 error myself on my GE range?
The fix for F91 is replacement of the Main Logic Board, which is a task some experienced DIYers can complete. You will need to locate the correct replacement board for your specific model, disconnect power to the range, and swap out the board following the connection layout of the original. If you are uncomfortable working with appliance electronics, a qualified technician should perform the repair.
Is it safe to use my GE range while it shows the F91 error?
An F91 error means the control board's touch interface circuitry is not functioning correctly, which could result in unreliable or unresponsive controls. Using the range in this condition is not recommended, as you may not be able to accurately control cooking functions or shut them off reliably. It is best to leave the range off until the board is replaced.
How much does it cost to fix an F91 error on a GE range?
The cost to repair an F91 error depends primarily on the price of the replacement Main Logic Board, which typically ranges from around $100 to $350 or more depending on the model. If you hire a technician, labor costs will add another $75 to $200 depending on your location and the service provider. DIY replacement of the board can significantly reduce the total cost.
Will resetting my GE range clear the F91 error code?
Power cycling the range by unplugging it or turning off the circuit breaker for a few minutes may temporarily clear the F91 code. However, because the fault is caused by a failed internal chip on the Main Logic Board, the error will almost certainly return once the board is powered back up. A reset does not address the underlying hardware failure.

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