Microwave displays F9 and may shut down or refuse to start; sometimes associated with power fluctuations.

Safety first: Disconnect the microwave from power before inspecting the cord or internal components.

• Check outlet and circuit: Plug another high-wattage appliance into the same outlet to verify stable power. Avoid using extension cords or power strips with the microwave.
• Inspect power cord: Examine the Fisher & Paykel microwave power cord for cuts, burns, or kinks. If damaged, the cord must be replaced.
• Reset and test: Unplug the unit for 5–10 minutes, then plug directly into a known-good outlet. If F9 clears and does not return, the issue may have been a temporary line disturbance.
• Internal inspection: If F9 persists, remove the outer cover (for countertop) or access panel and inspect the line filter board and connections from the cord to the control board. Look for burned components or loose connectors.
• Replace line filter or control board: If the line filter board is visibly damaged or tests faulty, replace it. If the filter is good but the control board's power supply section is defective, replace the main control PCB.