Fisher & Paykel Refrigerator Error Code INV-8

INV-8 means the refrigerator's inverter-controlled compressor failed to start after six consecutive attempts. The control system shuts down further startup attempts to protect the compressor from damage. This fault is most often triggered by high refrigerant pressure that builds up when the compressor is restarted too quickly after stopping. Allowing a 5-minute rest period to let system pressures equalize is the recommended first diagnostic step.

When the INV-8 fault is active, the compressor is not running, meaning the refrigerator is not cooling. Food safety becomes a concern relatively quickly, especially in the freezer compartment. You should attempt the pressure equalization restart first, and if cooling does not resume, transfer perishable items to another cooled location while arranging for a service call.

Repair costs depend entirely on the root cause. If the issue is simply high startup pressure and a rest period resolves it, there is no cost. An inverter board replacement typically ranges from $200 to $450 including parts and labor. Compressor replacement is significantly more expensive, often ranging from $400 to $800 or more depending on the model and local labor rates. A service call for diagnosis alone generally costs between $80 and $150.

The first step, waiting five minutes for refrigerant pressure to equalize and then attempting a restart, is something any homeowner can safely do. If the error returns after that rest period, the fault likely involves the inverter board, compressor motor, or refrigerant charge, all of which require a qualified appliance technician with the proper tools and refrigerant handling certification.

A power reset by unplugging the unit for a few minutes may clear the fault code and allow the refrigerator to attempt another startup sequence. However, if the underlying cause has not been resolved, such as a faulty inverter board or a failing compressor, the INV-8 error will return after the next failed startup attempt. The rest period and power reset may work together if high refrigerant pressure was the only cause.