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Error code reference

Fisher & Paykel Refrigerator Error Code F31

No display signal received (shorted or broken wire) on clock or data line.

Fisher & Paykel codesFisher & Paykel refrigerator codes

No display signal received (shorted or broken wire) on clock or data line.

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  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
  • Verified part numbers when replacement is required
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What F31 means on a Fisher & Paykel refrigerator

The F31 error code on a Fisher & Paykel refrigerator indicates that the main control board is not receiving a display signal from the user interface board. Specifically, the fault is detected on the clock or data communication line between these two boards. These lines carry serial communication signals that allow the control board and the display panel to exchange information. When the signal is absent, corrupted, or shorted to ground or voltage, the control board logs F31 and may disable certain functions or alert the user to the fault.

The most likely physical causes are a shorted wire, a broken wire, or a damaged connector in the wiring harness that runs between the main control board and the display board. A short circuit occurs when the clock or data line contacts an adjacent conductor or the chassis ground, pulling the signal low and preventing normal communication. A broken wire creates an open circuit, which similarly prevents the signal from reaching its destination. Both conditions are electrically distinct but produce the same result: no valid signal on the communication line.

Connector corrosion, pinched wiring, and damage from moisture intrusion are common contributors to this type of wiring fault in refrigerators. In some cases, the display board itself may have failed internally, causing it to stop transmitting the signal rather than a wiring fault being the root cause. The main control board can also fail in a way that makes it incapable of reading an otherwise valid signal, though this is a less frequent cause compared to wiring and connector issues.

Source: manufacturer service documentation.

Common causes of F31

  1. 01

    Damaged or broken wire on the communication line

    Part replacement

    A break in the clock or data wire between the control board and display board interrupts the signal entirely. Inspect the wiring harness for visible cuts, pinches, or areas where insulation has worn through.

  2. 02

    Shorted communication wire

    Part replacement

    If the clock or data line is contacting another wire, the chassis, or a grounded surface, it creates a short that kills the signal. Look for areas where wiring is routed near sharp metal edges or pinch points in the cabinet.

  3. 03

    Corroded or loose connector

    Wiring / connection

    Connector pins between the display board and control board can corrode or back out of their housing, breaking the electrical connection. Disconnect and reseat all connectors in the harness and check for green or white corrosion on the pins.

  4. 04

    Failed display board

    Part replacement

    An internally failed display board may stop transmitting the required clock or data signal even if the wiring is intact. If wiring and connectors check out, the display board should be tested or replaced.

  5. 05

    Failed main control board

    Part replacement

    In less common cases, the main control board loses the ability to read or interpret the incoming signal due to an internal component failure. This is typically diagnosed after wiring and the display board have been ruled out.

See the test procedure for each cause

Frequently asked questions about F31

What does F31 mean on a Fisher & Paykel refrigerator?
F31 means the main control board is not receiving a display signal on the clock or data communication line from the user interface board. This points to a shorted wire, broken wire, or a failed component in the communication circuit. The refrigerator flags this fault to alert you that communication between the control board and the display panel has been lost.
Can I fix an F31 error myself?
A knowledgeable DIYer can inspect the wiring harness and connectors for visible damage, corrosion, or loose connections and reseat connectors as a first step. However, if the fault is due to an internal wire break, a shorted harness, or a failed board, replacing those components requires some technical skill and the correct replacement parts. If you are not comfortable working with wiring or control boards, a qualified appliance technician is recommended.
Is an F31 error on a Fisher & Paykel refrigerator a safety concern?
The F31 fault is a communication error rather than a hazard-related fault like overheating or a refrigerant issue. However, if the display and control boards cannot communicate properly, the refrigerator may not operate correctly, which could compromise food safety over time. It is best to address the fault promptly to ensure the appliance is functioning as intended.
How much does it cost to repair an F31 error on a Fisher & Paykel refrigerator?
Repair costs depend on what is causing the fault. If only a wiring harness or connector needs repair, costs are generally in the range of $75 to $200 including labor. Replacing a display board or main control board typically raises the total to somewhere between $150 and $450 or more, depending on parts pricing and technician rates in your area.
Will resetting the refrigerator clear an F31 error?
A power reset may temporarily clear the error code from the display, but if the underlying wiring or component fault is still present, the F31 code will return once the control board attempts communication again. A reset is useful for confirming whether the fault is intermittent, but it does not repair a shorted wire, broken wire, or failed board. The root cause must be diagnosed and corrected for the error to be resolved permanently.

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