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Error code reference

Fisher & Paykel Refrigerator Error Code INV-14

Communication error between control module and inverter.

Fisher & Paykel codesFisher & Paykel refrigerator codes

Communication error between control module and inverter.

First step from the service manual

Check wiring connections on control module and inverter.

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

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  • Wiring diagram references and connector pinouts from the OEM service manual
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What INV-14 means on a Fisher & Paykel refrigerator

The INV-14 error code on a Fisher & Paykel refrigerator indicates a communication failure between the main control module and the inverter board. The inverter board controls the variable-speed compressor, regulating its speed based on cooling demand. These two components exchange data continuously over a dedicated communication line, and when that signal is interrupted or corrupted, the control module logs INV-14 and typically shuts down or restricts compressor operation to prevent damage.

The most frequent root cause of this fault is a loose, corroded, or damaged wiring harness connecting the control module to the inverter. Vibration over time can cause connectors to work loose, and moisture in the cabinet area can lead to pin corrosion that degrades the signal. Because the communication line carries low-voltage data signals, even a small amount of resistance introduced by a poor connection can break the link entirely.

If wiring checks out, the fault may point to a failed inverter board or a malfunctioning control module. A failed inverter may be unable to respond to the control module's communication attempts, while a control module fault can cause it to misinterpret valid responses or fail to send signals altogether. Component-level diagnosis is needed to isolate which board is at fault before any parts are replaced.

Source: manufacturer service documentation.

Common causes of INV-14

  1. 01

    Loose or disconnected wiring harness

    Wiring / connection

    The connector between the control module and inverter board may have vibrated loose over time. Inspect both ends of the harness for secure seating and signs of pull-out.

  2. 02

    Corroded or damaged connector pins

    Wiring / connection

    Moisture exposure can corrode the pins inside the communication harness connectors, increasing resistance and breaking the data signal. Look for green or white deposits on the pins at both the control module and inverter connections.

  3. 03

    Damaged wiring harness

    Part replacement

    The wire run between the two boards may have been pinched, chafed, or cut during a previous repair or from normal cabinet flexing. Inspect the full length of the harness for visible damage.

  4. 04

    Failed inverter board

    Part replacement

    If the inverter board has failed internally, it will not respond to communication signals from the control module, triggering INV-14. This is identified after wiring has been confirmed good.

  5. 05

    Faulty control module

    Part replacement

    A defective main control module may be unable to send or receive communication signals to the inverter. This is typically the least common cause and is diagnosed after the inverter and wiring have been ruled out.

See the test procedure for each cause

Frequently asked questions about INV-14

What does INV-14 mean on a Fisher & Paykel refrigerator?
INV-14 indicates a communication error between the main control module and the inverter board. The inverter board controls the variable-speed compressor, and this code appears when the data link between these two components fails. The cause can range from a loose wiring connector to a faulty board on either end of the circuit.
Can I fix INV-14 myself or do I need a technician?
Checking and reseating wiring connections on the control module and inverter is a reasonable first step for a confident DIYer. However, if the wiring appears intact and the error persists, diagnosing which board has failed requires technical knowledge and likely a technician. Replacing inverter or control boards involves working around capacitor-stored voltage, so caution is essential.
Is it safe to keep using my refrigerator while INV-14 is displayed?
The refrigerator may not cool properly while this error is active, since compressor operation can be restricted or stopped. Running the unit in this state puts your food at risk and is not recommended for extended periods. The fault should be diagnosed and resolved promptly to avoid food spoilage.
Will resetting the refrigerator clear the INV-14 error?
A power reset by unplugging the unit for several minutes may temporarily clear the code if the fault was caused by a transient signal disruption. However, if there is an underlying wiring or component issue, the error will return once the refrigerator restarts and attempts communication again. A reset is a useful first step but is not a fix on its own.
How much does it cost to repair an INV-14 error on a Fisher & Paykel refrigerator?
If only a wiring connector needs to be reseated or cleaned, the repair cost may be limited to a service call fee, typically in the range of $75 to $150. Replacing an inverter board generally adds $150 to $400 in parts depending on the model, while a new control module can add a similar or higher cost. Total repair costs including labor can range from $200 to $600 or more depending on which components need replacement.

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