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Error code reference

GE Ice Maker Error Code LED flashing 1 second

Faulty bin thermistor not detected (disconnected or open bin thermistor).

GE codesGE ice maker codes

Faulty bin thermistor not detected (disconnected or open bin thermistor).

First step from the service manual

Look for a disconnected or open bin thermistor; test thermistor and wiring harness.

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

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What LED flashing 1 second means on a GE ice maker

The LED flashing 1 second on a GE ice maker signals a fault with the bin thermistor, specifically that the control board cannot detect a valid signal from it. The bin thermistor is a temperature-sensing resistor mounted in the ice storage bin area that monitors ice levels and bin temperature. When this sensor is disconnected or its circuit is open, the control board loses its ability to regulate ice production correctly and triggers this fault code to alert the technician.

An open thermistor circuit typically means the sensor itself has failed internally, causing its resistance to read outside the expected range, or that a wiring connection somewhere between the thermistor and the control board has come apart. Thermistors used in ice maker applications are NTC (negative temperature coefficient) type components, meaning their resistance decreases as temperature rises. A disconnected or open thermistor will present essentially infinite resistance, which the board interprets as a sensor fault.

Diagnosing this code requires physically inspecting the bin thermistor connector and wiring harness for any loose pins, broken wires, or corrosion, and then testing the thermistor resistance with a multimeter to confirm it falls within the expected range for the ambient temperature. If the wiring harness checks out but the thermistor reads open or out of range, the thermistor itself needs replacement. Always inspect the full harness run from the thermistor to the control board for pinched or damaged sections before condemning the sensor.

Source: manufacturer service documentation.

Common causes of LED flashing 1 second

  1. 01

    Disconnected bin thermistor connector

    Wiring / connection

    The wiring connector at the bin thermistor can work itself loose over time, especially in environments where the unit vibrates during operation. Inspect the connector at the thermistor and trace the harness to check for any unplugged or partially seated connections.

  2. 02

    Failed bin thermistor (open circuit)

    Part replacement

    The thermistor itself can fail internally, causing it to read as an open circuit on a multimeter. A reading of infinite or very high resistance at room temperature confirms the thermistor needs to be replaced.

  3. 03

    Damaged wiring harness

    Part replacement

    Wiring between the bin thermistor and the control board can become pinched, frayed, or broken, interrupting the circuit. Carefully inspect the full length of the harness for visible damage or breaks.

  4. 04

    Corroded or oxidized connector terminals

    Wiring / connection

    Moisture inside the ice maker can cause the thermistor connector terminals to corrode, increasing resistance or breaking the circuit entirely. Look for greenish or white oxidation on the pins and clean or replace the connector as needed.

  5. 05

    Faulty control board

    Part replacement

    If the thermistor and entire wiring harness test correctly but the fault code persists, the control board's thermistor input circuit may have failed. This is the least common 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 LED flashing 1 second

What does LED flashing 1 second mean on a GE ice_maker?
This fault code indicates that the control board cannot detect a valid signal from the bin thermistor, which monitors temperature in the ice storage bin. The thermistor is either physically disconnected from its wiring harness or has failed internally with an open circuit. The ice maker will not operate normally until the fault is resolved. A technician will need to test the thermistor resistance and inspect the wiring harness to identify the exact cause.
How do I fix the LED flashing 1 second error on my GE ice maker?
Start by checking whether the bin thermistor connector is fully seated and that no wires in the harness are visibly damaged or broken. Next, use a multimeter to test the resistance of the thermistor itself. If the thermistor reads as open or out of range for the ambient temperature, replace the sensor. If the thermistor tests fine, inspect the full wiring harness between the sensor and the control board for damage.
Is it safe to continue using my GE ice maker when this error code is active?
It is not recommended to rely on the ice maker while this fault is active. Without a functioning bin thermistor, the unit cannot accurately monitor conditions inside the ice bin, which can affect ice production cycles and potentially lead to overfill or other operational problems. Resolve the fault before returning the unit to regular use.
How much does it cost to repair a GE ice maker with a bin thermistor fault?
If only the thermistor needs replacement, parts typically cost between $15 and $50 depending on the specific model, with labor adding $75 to $150 if a technician performs the repair. If the wiring harness or control board is also involved, total repair costs could range from $150 to $350 or more. Getting a diagnostic call before committing to repairs is a good way to avoid unexpected costs.
Will resetting my GE ice maker clear the LED flashing 1 second error code?
A reset may temporarily clear the fault code display, but the error will return if the underlying problem with the bin thermistor or its wiring has not been corrected. The control board checks the thermistor circuit continuously, so a disconnected or failed sensor will trigger the fault again shortly after a reset. Permanent resolution requires repairing or replacing the faulty component.

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