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Error code reference

GE Ice Maker Error Code ON/OFF LED flashing

Ice level sensor (bin thermistor) error detected; icemaker will not operate.

GE codesGE ice maker codes

Ice level sensor (bin thermistor) error detected; icemaker will not operate.

First step from the service manual

Unplug icemaker and remove cutter grid cover. Make sure the white wiring connector going up to the control housing on the right side is connected securely.

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

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What ON/OFF LED flashing means on a GE ice maker

The ON/OFF LED flashing error on a GE ice maker indicates that the control board has detected a fault in the ice level sensor circuit, also called the bin thermistor. This thermistor is a temperature-sensitive resistor mounted in the ice maker assembly that monitors the ice level in the bin by detecting temperature changes. When ice fills the bin and contacts or comes near the thermistor, the temperature drops and the resistance value changes, signaling the control to halt ice production. If the control cannot read a valid signal from the thermistor, it triggers this flashing LED fault and shuts down all ice-making operations entirely.

The most common starting point for diagnosis is a wiring connection issue rather than a failed thermistor. The white wiring connector that runs from the cutter grid area up to the control housing on the right side of the unit is a known failure point. Vibration during operation, improper reinstallation after cleaning, or simple connector fatigue can cause this plug to work loose, breaking the signal circuit between the thermistor and the control board. This is why the first diagnostic step involves unplugging the unit, removing the cutter grid cover, and physically inspecting and reseating that connector before pursuing any component replacement.

If the connector is secure and the fault persists, the thermistor itself may have drifted out of its acceptable resistance range or failed outright, producing a reading the control board interprets as an open or shorted circuit. The control housing or control board could also be at fault if it is unable to process a valid thermistor signal even when the sensor and wiring are intact. Systematic testing of resistance at the thermistor and continuity through the wiring harness will help isolate which component is responsible.

Source: manufacturer service documentation.

Common causes of ON/OFF LED flashing

  1. 01

    Loose or disconnected wiring connector

    Wiring / connection

    The white wiring connector linking the ice level sensor to the control housing on the right side can work loose over time. Reseating this connector firmly after unplugging the unit and removing the cutter grid cover often resolves the fault without any parts replacement.

  2. 02

    Failed or out-of-range bin thermistor

    Part replacement

    The bin thermistor can fail internally or drift outside its specified resistance range, causing the control board to read an invalid signal. Testing thermistor resistance and comparing it to the expected value will confirm whether the sensor needs replacement.

  3. 03

    Damaged or broken wiring harness

    Part replacement

    The wiring between the thermistor and the control housing may have a break, pinch, or damaged insulation that interrupts the sensor signal. A continuity check along the harness will identify any open or shorted sections.

  4. 04

    Corroded or damaged connector terminals

    Part replacement

    Even if the connector is physically seated, individual terminals inside the connector can corrode or bend, preventing reliable electrical contact. Inspecting the terminals visually and cleaning or replacing the connector may be necessary.

  5. 05

    Faulty control board

    Part replacement

    If the thermistor, wiring, and connectors all test correctly, the control board itself may be unable to process the thermistor signal properly. A control board failure is the least common cause and is typically diagnosed after all other components are confirmed good.

See the test procedure for each cause

Frequently asked questions about ON/OFF LED flashing

What does ON/OFF LED flashing mean on a GE ice_maker?
The ON/OFF LED flashing indicates that the control board has detected an error in the ice level sensor circuit, specifically the bin thermistor. Because the unit cannot confirm the status of the ice bin, it shuts down ice production entirely to prevent an overflow condition. This fault will keep the ice maker from running until the underlying issue is diagnosed and corrected.
How do I fix the ON/OFF LED flashing error on my GE ice maker?
Start by unplugging the ice maker and removing the cutter grid cover, then locate and firmly reseat the white wiring connector that runs up to the control housing on the right side of the unit. If the error returns after restoring power, the next step is to test the bin thermistor for proper resistance and check the wiring harness for continuity. Depending on what testing reveals, you may need to replace the thermistor, repair the wiring, or in less common cases replace the control board.
Is it safe to keep using my GE ice maker when the ON/OFF LED is flashing?
No, the ice maker will not operate when this error is active, so there is no ice being produced regardless. The unit has effectively locked itself out as a protective measure. There is no immediate safety hazard from the fault itself, but you should address the underlying sensor or wiring issue before expecting normal operation to resume.
Will resetting my GE ice maker clear the ON/OFF LED flashing error?
A reset may temporarily clear the error code, but if the bin thermistor circuit still has a fault, the flashing LED will return once the control board runs its diagnostic checks again. A reset is not a fix for the underlying problem. The wiring connection, thermistor, and harness need to be inspected and corrected to permanently resolve the fault.
How much does it cost to repair a GE ice maker with the ON/OFF LED flashing error?
If the issue is simply a loose connector, the repair costs nothing beyond your time. If the bin thermistor needs replacement, parts typically range from around $20 to $60 depending on the specific model. A control board replacement, if required, can cost considerably more, generally in the range of $80 to $200 or higher for parts alone, with additional labor costs if you use a professional technician.

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