E5
Hisense
Inverter Power Supply Fault (Inverter Models Only)
Microwave shows E5 and will not start any cooking program.
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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.
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Possible Causes
Defective inverter power board,Shorted magnetron drawing excessive current,Loose wiring between inverter and main PCB,Overcurrent protection triggered
How to Fix / Troubleshooting
Danger: Inverter-based microwaves operate at very high voltages and frequencies. Internal repairs are not safe for untrained persons. Do not remove the cover.
User-level troubleshooting:
- Reset power: Unplug the microwave for at least 10 minutes to allow the inverter and control board to discharge and reset. Plug back in and test.
- Check for overloading: Ensure you are not using metal containers, oversized dishes, or tightly sealed containers that could cause arcing or abnormal load.
- Try low power setting: Attempt a short cook at 30–50% power with a cup of water. If E5 appears immediately, the inverter or magnetron is likely faulty.
Service recommendation:
- Contact a Hisense-authorized service center. The technician will test the inverter board, magnetron, and wiring harness for shorts or open circuits.
- Typically, the inverter board or magnetron assembly is replaced as a unit.
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Repair Difficulty
Professional Required
5/5
Required Part
Inverter Power Board
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