Microwave shows E9 and interior light, turntable, or fan may not operate correctly.

Safety Warning: Unplug the microwave before any disassembly. High-voltage components are present inside.

Initial checks:

• 1. Verify outlet: Plug another appliance into the same outlet to confirm stable power. Avoid using long extension cords or power strips.
• 2. Reset: Unplug the microwave for 5–10 minutes, then plug back in and test. If E9 returns, internal electronics are likely at fault.

Internal inspection (technician recommended):

• 3. Inspect control board: With the unit unplugged and cover removed, a technician will inspect the control/relay board for burned traces, swollen capacitors, or damaged relays.
• 4. Check harnesses: Ensure all connectors to the control board are fully seated and free of corrosion.

Because E9 typically indicates a control board or relay failure, replacement of the main PCB is usually required and should be performed by a professional.