H97
GE
Inverter or High-Voltage System Failure
Microwave displays H97 and will not heat; fan and light may still operate.
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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 (for inverter models), Shorted magnetron, Open high-voltage wiring between inverter and magnetron, Faulty high-voltage transformer (non-inverter models rarely use H97)
How to Fix / Troubleshooting
Danger: The high-voltage system in a microwave is extremely hazardous. Do not attempt to service the inverter, magnetron, or high-voltage wiring unless you are a trained technician.
- Power reset: Unplug for 5 minutes and retry. If H97 returns immediately when starting a cook cycle, a hardware failure is likely.
- Ventilation check: Ensure vents are clear; overheating can stress the inverter.
- Do not operate repeatedly: Repeated attempts to start with H97 can further damage components.
- Professional service: Contact a qualified GE service technician to diagnose the inverter board, magnetron, and related wiring. These parts require specialized tools and safety procedures to test and replace.
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Repair Difficulty
Professional Required
5/5
Required Part
Inverter Board
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