Microwave shows E9; unit may shut down mid-cycle and require unplugging to reset.

Safety first: Unplug the microwave before inspection.

• Check outlet: Plug another high-wattage appliance (like a kettle) into the same outlet to verify stable power. Avoid using extension cords or power strips with the microwave.
• Inspect power cord: Check the Ambiano microwave power cord for cuts, kinks, or burn marks. Replace if damaged.
• Internal fuse check (technician-level): Remove the outer cover and locate the line fuse (usually in a fuse holder near the power cord entry). Test for continuity with a multimeter. Replace only with the same type and rating if blown.
• Thermal fuse/thermal cut-out: Inspect cavity and magnetron thermal fuses for signs of overheating. Test continuity and replace if open.
• Control board: If fuses are good and power is stable but E9 persists, the low-voltage power supply on the control PCB may be failing and require board replacement.