Fisher & Paykel Refrigerator Error Code INV-13

The INV-13 error code on a Fisher & Paykel refrigerator indicates that the inverter control board has detected an over current condition in the compressor circuit. The inverter drive monitors the electrical current flowing to the variable-speed compressor motor continuously. When the current draw exceeds the acceptable threshold, the inverter shuts down the compressor and triggers this fault code to protect the system from damage caused by excessive amperage.

The most common root cause is a fault within the compressor itself. Shorted or grounded compressor windings will draw abnormally high current, causing the inverter to trip immediately or shortly after startup. A mechanical seizure inside the compressor can also produce the same result, as the motor strains against resistance and pulls excess current. The diagnostic starting point is to check the compressor windings for correct resistance values and confirm there is no short to ground, along with inspecting the wiring harness between the inverter board and the compressor for damaged insulation, pinched wires, or corroded terminals.

Additionally, a failing inverter board can misread current levels or have internal component failures that cause it to report an over current condition even when the compressor is healthy. If winding resistance values measure within specification and the harness shows no faults, the inverter board itself should be considered suspect. Because this fault involves compressor drive circuitry operating at significant voltage and current levels, proper electrical safety precautions are essential before performing any hands-on diagnostics.