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Error code reference

Fisher & Paykel Refrigerator Error Code 31

Display harness fault

Fisher & Paykel codesFisher & Paykel refrigerator codes

Display harness fault - clock/data wire.

First step from the service manual

Check continuity of harness between internal display and power/control module. Replace harness plug if necessary.

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

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What 31 means on a Fisher & Paykel refrigerator

Error code 31 on a Fisher & Paykel refrigerator indicates a display harness fault specifically related to the clock or data wire connecting the internal display panel to the power/control module. This communication line carries serial data signals that allow the control module to update the display and receive input commands. When the fault is detected, the refrigerator's control system has determined that this signal path is broken, shorted, or producing unexpected readings.

The harness itself is a ribbon or wire assembly routed between the internal user interface display and the main power/control module. The clock wire and data wire are distinct lines within this harness that work together to transmit timed digital signals. A fault on either of these lines disrupts the entire communication sequence, triggering error code 31. Common physical causes include a damaged wire, a loose or corroded connector plug, a pinched section of the harness from cabinet assembly, or a failed connector terminal.

The recommended first diagnostic step is to check continuity of the harness between the internal display and the power/control module. A working harness should show continuous, uninterrupted conductivity along each wire. If continuity is absent or intermittent on the clock or data line, the harness or its plug is the primary suspect. Replacing the harness plug is often sufficient if the wiring itself is intact but the connector has lost proper contact due to corrosion or physical damage.

Source: manufacturer service documentation.

Common causes of 31

  1. 01

    Loose or disconnected harness plug

    Wiring / connection

    The connector plug between the display harness and either the display panel or the power/control module may have worked loose over time. Reseating the plug firmly on both ends is the first physical check to perform.

  2. 02

    Corroded or damaged connector terminals

    Part replacement

    Moisture or age can cause the terminals inside the harness plug to corrode, increasing resistance or breaking the circuit on the clock or data wire. Inspect the terminals for discoloration, pitting, or deformation.

  3. 03

    Broken or open wire in the harness

    Part replacement

    A wire within the harness can break internally, especially at bend points or areas where it passes through cabinet panels. A continuity test along the clock and data lines will confirm whether an open circuit exists.

  4. 04

    Pinched harness from cabinet or door assembly

    Part replacement

    During installation or previous servicing, the harness may have been pinched between cabinet panels, causing a short or an open condition in the clock or data wire. Inspect the full harness routing for any visible compression or chafing.

  5. 05

    Failed internal display panel

    Part replacement

    If the harness and its connectors test good for continuity, the internal display panel itself may have a fault at its communication interface. Replacing the display panel is typically considered after harness integrity has been confirmed.

See the test procedure for each cause

Frequently asked questions about 31

What does 31 mean on a Fisher & Paykel refrigerator?
Error code 31 signals a display harness fault on the clock or data wire between the internal display panel and the power/control module. This means the two components are unable to communicate properly due to a wiring or connector issue. The fault does not necessarily affect the refrigerator's cooling performance, but it does disrupt the display and control interface. Diagnosing the harness for continuity is the correct first step.
Can I fix error code 31 on my Fisher & Paykel refrigerator myself?
A technically confident DIYer can attempt this repair by first unplugging the refrigerator, then inspecting and reseating the harness connectors at both the display panel and the power/control module. If reseating the connectors does not resolve the fault, a continuity test with a multimeter along the clock and data wires will identify whether the harness needs replacement. Replacing the harness plug or the full harness assembly is within the skill range of someone comfortable with basic appliance wiring work.
Is it safe to keep using my refrigerator while error code 31 is active?
Error code 31 is a communication fault between the display and the control module, not a refrigerant or compressor fault, so your food may remain adequately cooled in the short term. However, a disrupted control interface can affect your ability to monitor or adjust temperatures accurately. It is best to address the fault promptly rather than operate the refrigerator indefinitely with an unresolved communication error.
Will resetting my Fisher & Paykel refrigerator clear error code 31?
A power reset by unplugging the refrigerator for several minutes may temporarily clear the error code from the display, but if the underlying harness fault is still present, the code will return. A reset alone does not repair a broken wire, corroded terminal, or loose connector. The physical harness and its plugs must be inspected and repaired to permanently resolve error code 31.
How much does it cost to repair error code 31 on a Fisher & Paykel refrigerator?
Repair costs depend on whether only the connector plug needs replacement or the full harness assembly is required, and whether you hire a technician or source the part yourself. Parts for the harness or plug typically fall in the range of $20 to $80 depending on the specific model. If a technician is needed for diagnosis and installation, labor charges can bring the total repair cost to a range of $100 to $250 or more depending on your location and service rates.

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