E5
Haier
Inverter or high-voltage power supply fault (for inverter models)
Microwave shows E5 and stops heating or will not start
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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
Failed inverter board, Shorted magnetron, Loose high-voltage wiring, Defective main PCB drive circuit
How to Fix / Troubleshooting
Critical safety warning: The inverter and high-voltage circuits operate at lethal voltages. Do not attempt to probe or repair the inverter or magnetron unless you are a trained professional. Always unplug the microwave.
- Basic checks only: Confirm the outlet has proper voltage and the plug is secure. Try a different outlet to rule out supply issues.
- Listen and observe: When starting a cook cycle, if the light and turntable work but there is a loud buzzing or immediate shutdown with E5, the inverter or magnetron is likely faulty.
- Do not repeatedly restart: Repeated attempts can further damage components.
- Visual inspection (limited): With the cover removed (unplugged), you may visually inspect for obvious burn marks on the inverter board or melted connectors, but do not touch or attempt to discharge the capacitor.
- Professional service recommended: Inverter and magnetron replacement require specialized tools and safety procedures. Contact an authorized Haier service center.
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Repair Difficulty
Professional Required
5/5
Required Part
Inverter Board
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