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Error code reference

GE Refrigerator Error Code 23

The resistance of the PC sensor 2 is outside the normal range (< 660 Ohms)

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The resistance of the PC sensor 2 is outside the normal range (< 660 Ohms). PC2 sensor hot.

First step from the service manual

Check the connection of the sensor at the module. Check the resistance of the sensor.

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

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What 23 means on a GE refrigerator

Error code 23 on a GE refrigerator indicates that the resistance reading from PC sensor 2 (Precooler sensor 2) has dropped below 660 ohms, which falls outside the acceptable operating range. This is described as a "PC2 sensor hot" condition, meaning the sensor is reporting an abnormally high temperature. NTC (negative temperature coefficient) thermistors like this one decrease in resistance as temperature rises, so a resistance reading below 660 ohms signals that the sensor is detecting an extreme heat condition or that the sensor itself has failed and is producing an inaccurate low-resistance reading.

The PC sensor 2 is part of the refrigerator's temperature monitoring system, responsible for tracking thermal conditions in a specific zone of the sealed system or cooling circuit. When this sensor reports out-of-range data, the control module flags the fault to prevent the system from operating under potentially damaging temperature conditions. The first diagnostic step is to inspect the sensor's wiring harness connection at the control module, then measure the sensor's resistance with a multimeter to determine whether the fault is due to a wiring issue or a failed sensor component. A resistance reading below 660 ohms at normal ambient temperature confirms the sensor has failed and requires replacement.

Source: manufacturer service documentation.

Common causes of 23

  1. 01

    Failed PC2 temperature sensor

    Part replacement

    The NTC thermistor sensor itself has failed internally, causing its resistance to drop below 660 ohms regardless of actual temperature. Confirm by measuring resistance directly across the sensor terminals with a multimeter.

  2. 02

    Loose or corroded sensor connector at the module

    Wiring / connection

    A poor connection at the control module can cause erroneous low-resistance readings. Inspect the connector for corrosion, bent pins, or incomplete seating and reseat or clean as needed.

  3. 03

    Damaged sensor wiring harness

    Part replacement

    A short circuit in the wiring between the sensor and the control board can pull the resistance reading below the 660-ohm threshold. Inspect the harness for pinched, chafed, or melted insulation.

  4. 04

    Actual overheating in the sensor zone

    Wiring / connection

    If the area monitored by PC2 is genuinely overheating due to a refrigerant restriction or condenser issue, the sensor may be reading accurately. Check for other cooling system faults alongside this error code.

See the test procedure for each cause

Frequently asked questions about 23

What does 23 mean on a GE refrigerator?
Error code 23 on a GE refrigerator means the resistance of PC sensor 2 has dropped below 660 ohms, which is outside the normal operating range. This is flagged as a "PC2 sensor hot" condition. It indicates the sensor is either detecting an extremely high temperature or has failed and is producing an inaccurate resistance reading. A technician should check the sensor connection and measure the sensor's resistance to diagnose the fault.
Can I fix error code 23 on my GE refrigerator myself?
A knowledgeable DIYer can start by inspecting the sensor wiring connector at the control module and reseating it to rule out a loose connection. If you have a multimeter, you can measure the resistance across the PC2 sensor terminals and compare it to the 660-ohm minimum threshold. If the sensor resistance is below this value, the sensor will need to be replaced, which requires identifying the correct part for your specific model. If you are not comfortable working with electrical components, a qualified appliance technician should perform the repair.
Is error code 23 on a GE refrigerator a safety concern?
Error code 23 itself is not an immediate safety hazard to people in the home, but it does mean the refrigerator's temperature monitoring system is compromised. If the root cause is actual overheating in the cooling circuit rather than a failed sensor, running the unit without addressing the problem could lead to further component damage. It is best to diagnose and resolve the error promptly to protect your food and the refrigerator's sealed system components.
Will resetting my GE refrigerator clear error code 23?
Resetting the refrigerator by unplugging it briefly may temporarily clear the error display, but the code will return if the underlying cause has not been corrected. Because code 23 is tied to a sensor resistance reading below 660 ohms, the control module will re-detect the fault as soon as it runs its diagnostics again. The connection and sensor resistance should be tested before assuming a reset has resolved the problem.
How much does it cost to repair error code 23 on a GE refrigerator?
If the fix is simply reseating a loose connector at the control module, there may be little to no parts cost, though a service call will typically run between $75 and $150 for diagnosis. If the PC2 temperature sensor has failed and needs replacement, parts costs generally range from $20 to $60 depending on the specific model, plus labor if a technician performs the repair. If the underlying cause involves a more serious cooling system issue, repair costs could be higher and would depend on the specific components involved.

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