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Error code reference

GE Refrigerator Error Code F10

Freezer icemaker mold body thermistor (MB) invalid (not on Café models).

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Freezer icemaker mold body thermistor (MB) invalid (not on Café models).

First step from the service manual

Check thermistor resistance.

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

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What F10 means on a GE refrigerator

The F10 error code on GE refrigerators (excluding Café models) indicates that the control board has detected an invalid signal from the freezer icemaker mold body thermistor, designated MB. This thermistor is a small temperature-sensing resistor embedded in or mounted on the icemaker mold assembly. Its job is to report the mold temperature to the control board so the icemaker cycle can advance correctly, triggering harvest at the right moment. When the board reads a resistance value outside the expected range, it flags F10 to indicate the sensor input cannot be trusted.

Thermistors change resistance predictably with temperature. If the MB thermistor reads an open circuit, a short, or a resistance value that falls outside the valid operating window, the control board treats the signal as invalid and halts normal icemaker operation. This protects the system from attempting a harvest cycle at the wrong temperature, which could cause mechanical damage or ice quality problems.

The most direct diagnostic step is to measure the thermistor's resistance with a multimeter and compare the reading to the expected value for the current mold temperature. A failed thermistor will typically show either infinite resistance (open circuit) or near-zero resistance (short). Wiring issues between the thermistor and the control board, including damaged connectors or broken leads, can produce the same invalid signal and should be inspected before replacing the thermistor itself.

Source: manufacturer service documentation.

Common causes of F10

  1. 01

    Failed mold body thermistor (MB)

    Part replacement

    The thermistor itself has failed internally, producing an open circuit or short that the control board reads as an invalid value. Measuring resistance across the thermistor terminals will show a reading far outside the normal operating range.

  2. 02

    Damaged or disconnected wiring harness

    Wiring / connection

    The wires or connector between the MB thermistor and the control board may be broken, corroded, or unplugged, causing an open or intermittent signal. Visually inspect the harness and connector for damage, corrosion, or loose seating.

  3. 03

    Moisture or ice intrusion at the connector

    Wiring / connection

    Ice buildup or condensation around the icemaker can penetrate the thermistor connector, causing corrosion or shorting the contacts. Inspect the connector for signs of moisture, rust, or ice bridging across terminals.

  4. 04

    Faulty icemaker assembly

    Part replacement

    In some cases the thermistor is not serviceable separately and is integrated into the icemaker mold assembly. If the thermistor tests bad and cannot be replaced individually, the entire icemaker assembly may need to be replaced.

  5. 05

    Control board misread or failure

    Part replacement

    Less commonly, the main control board's thermistor input circuit may be faulty, causing it to misinterpret a valid resistance signal as invalid. This should only be considered after confirming the thermistor and wiring check out correctly.

See the test procedure for each cause

Frequently asked questions about F10

What does F10 mean on a GE refrigerator?
F10 on a GE refrigerator indicates that the freezer icemaker mold body thermistor (MB) is sending an invalid signal to the control board. This code does not apply to Café models. The thermistor is a temperature sensor in the icemaker mold, and when its resistance falls outside the expected range, the board flags the error and may suspend icemaker operation.
How do I fix the F10 error on my GE refrigerator?
Start by checking the resistance of the mold body thermistor using a multimeter. If the reading is open (infinite resistance) or shorted (near zero), the thermistor needs to be replaced. Also inspect the wiring harness and connector between the thermistor and the control board for damage, corrosion, or loose connections. If all wiring is intact and the thermistor resistance is correct, the control board may be at fault.
Will resetting my GE refrigerator clear the F10 code?
A reset may temporarily clear the F10 code, but it will return if the underlying fault with the mold body thermistor or its wiring is not corrected. Unplugging the refrigerator for a few minutes can reset the control board, but this is not a repair. The thermistor or wiring issue needs to be diagnosed and resolved to permanently clear the code.
Is the F10 error on a GE refrigerator a safety concern?
F10 is not a safety hazard in the way that a gas leak or electrical fire would be. It is a component monitoring fault that affects icemaker operation. The refrigerator's cooling system should continue to function normally. However, leaving the fault unaddressed may keep the icemaker from producing ice, and in some cases the control board may restrict icemaker cycles to prevent damage.
How much does it cost to repair a GE refrigerator F10 error?
Repair costs depend on which component has failed. A replacement thermistor or icemaker assembly can range from roughly 20 dollars to 150 dollars or more for parts, depending on the specific model. If a technician is needed for diagnosis and installation, labor costs typically add another 75 dollars to 200 dollars. Replacing only the wiring harness or cleaning a corroded connector is generally the least expensive fix.

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