Microwave shows E5 and stops heating or will not start; may occur after long cooking cycles.

Safety warning: Inverter-based microwaves use high-frequency high-voltage circuits that are extremely dangerous. Do not attempt inverter repairs without proper training and tools.

User-level checks:

• 1. Allow cooling: Unplug the microwave and let it cool for 20–30 minutes. Ensure vents are not blocked and that there is adequate clearance around the unit. Plug back in and test.
• 2. Avoid overloading: Do not run the microwave for extended periods at maximum power with large loads, as this can trigger inverter protection.
• 3. Check for error pattern: If E5 appears immediately on every start attempt, the inverter or magnetron is likely defective.

Technician-level actions (summary):

• Inspect and test the inverter board for shorts or burnt components.
• Check magnetron current draw and insulation resistance.
• Verify wiring between control PCB and inverter module.
• Replace inverter board and/or magnetron as required with OEM Midea parts.

Due to the high risk, most users should contact a qualified technician for E5 faults.