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Error code reference

Fisher & Paykel Refrigerator Error Code 23

The resistance of the ambient sensor is outside the normal range (< 660 Ohms); sensor hot

Fisher & Paykel codesFisher & Paykel refrigerator codes

The resistance of the ambient sensor is outside the normal range (< 660 Ohms); sensor hot. Sensor located under the LH door hinge cover (French door models only).

First step from the service manual

Check the connection of the sensor at the power/control 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 Fisher & Paykel refrigerator

Error code 23 on a Fisher & Paykel refrigerator indicates that the ambient temperature sensor is reading a resistance value below 660 ohms, which the control system interprets as an abnormally high temperature condition at the sensor location. This sensor is a negative temperature coefficient (NTC) thermistor, meaning its resistance decreases as temperature rises. A reading below the minimum threshold signals either that the actual ambient temperature around the sensor is genuinely extreme, or that the sensor or its wiring circuit has developed a fault causing artificially low resistance.

On French door models, this ambient sensor is physically located beneath the left-hand door hinge cover. This placement exposes the sensor and its connector to potential mechanical stress from door operation, moisture ingress, and general wear over time. The connection point at the power/control module is another common failure location, as loose or corroded terminals can alter the circuit resistance and produce false readings. The diagnostic process begins with inspecting the sensor connector at the module for proper seating and signs of corrosion, then measuring the actual resistance across the sensor leads with a multimeter to confirm whether the sensor itself has failed.

If the resistance reading at the sensor is confirmed to be below 660 ohms under normal ambient conditions, the sensor has failed and requires replacement. If resistance measures within an expected range but the error persists, attention should shift to the wiring harness between the sensor and the control module, looking for shorts to ground or damaged insulation that could be pulling resistance values artificially low.

Source: manufacturer service documentation.

Common causes of 23

  1. 01

    Failed ambient temperature sensor

    Part replacement

    The NTC thermistor sensor itself has failed internally, causing its resistance to drop below the 660 ohm minimum threshold. This is confirmed by measuring the sensor resistance directly with a multimeter and finding it outside the expected range for the current ambient temperature.

  2. 02

    Loose or corroded sensor connector at the control module

    Wiring / connection

    The connector joining the ambient sensor wiring to the power/control module can loosen or corrode over time, creating resistance anomalies in the circuit. Inspecting and reseating the connector, or cleaning corroded terminals, may resolve the error without part replacement.

  3. 03

    Damaged wiring harness between sensor and control module

    Part replacement

    The wiring running from the sensor under the left-hand hinge cover to the control module may have developed a short to ground or have damaged insulation, artificially lowering the circuit resistance. Visual inspection of the harness along its full routing is needed to identify pinched or chafed sections.

  4. 04

    Extreme ambient temperature at sensor location

    Wiring / connection

    If the refrigerator is installed in an environment with genuinely very high ambient temperatures, the sensor reading may reflect actual conditions rather than a fault. Verifying that the installation area is within the appliance's specified operating temperature range can rule this out.

  5. 05

    Moisture or debris under the door hinge cover

    Wiring / connection

    Water intrusion or debris accumulation beneath the left-hand door hinge cover can affect the sensor and its connections. Removing the hinge cover and inspecting for moisture, corrosion, or contamination around the sensor body and connector is a useful early diagnostic step.

See the test procedure for each cause

Frequently asked questions about 23

What does 23 mean on a Fisher & Paykel refrigerator?
Error code 23 means the ambient temperature sensor is reporting a resistance value below 660 ohms, which indicates the sensor is reading an abnormally high temperature. This sensor is located under the left-hand door hinge cover on French door models. The fault can result from a failed sensor, a loose connection at the control module, or a wiring problem in the circuit between the sensor and the module.
How do I fix error code 23 on my Fisher & Paykel refrigerator?
Start by checking the sensor connector at the power/control module to ensure it is fully seated and free of corrosion. Next, use a multimeter to measure the resistance of the ambient sensor itself. If the resistance is below 660 ohms under normal room temperature conditions, the sensor needs to be replaced. If the sensor resistance is normal, inspect the wiring harness for damage or shorts between the sensor and the control module.
Is error code 23 on a Fisher & Paykel refrigerator a safety concern?
Error code 23 is primarily a functional concern rather than an immediate safety hazard. However, if the ambient sensor is faulty, the refrigerator's control system may not be accurately monitoring temperature conditions, which could affect cooling performance over time. It is best to diagnose and resolve the fault promptly to ensure the appliance continues operating correctly.
How much does it cost to repair error code 23 on a Fisher & Paykel refrigerator?
If only the ambient temperature sensor needs replacement, parts and labor costs typically range from around $100 to $250 depending on your location and service provider. If the wiring harness or control module is also involved, costs could be higher, potentially ranging from $200 to $450 or more. A diagnostic visit from a technician will clarify exactly which components need attention before committing to a repair.
Will resetting my Fisher & Paykel refrigerator clear error code 23?
A reset may temporarily clear the error code display, but if the underlying cause such as a faulty sensor, damaged wiring, or loose connection is not addressed, the code will return. Resetting the appliance without completing a proper diagnosis is not a reliable solution. The sensor resistance and connector should be tested to confirm the fault is resolved before considering the issue closed.

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