Microwave displays E8 and does not heat; sometimes accompanied by unusual humming.
Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
Possible Causes
How to Fix / Troubleshooting
Danger: Inverter-based microwaves use high-frequency high voltage that is extremely dangerous. Only trained technicians should service inverter or high-voltage sections.
User actions:
- Unplug the microwave immediately and do not continue to operate it.
- Do not remove the cabinet or attempt to access the inverter board or magnetron.
- Contact Hamilton Beach support or a qualified technician for diagnosis and repair.
Technician actions (for reference): Test the inverter board, magnetron, and associated wiring for shorts/opens and replace defective components with correct Hamilton Beach parts.
Repair Difficulty
Required Part
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