H97
Frigidaire
Inverter / Magnetron Start-Up Failure
Microwave displays H97 and will not heat; may stop shortly after starting.
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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 board, Failing magnetron drawing excessive current, Loose high-voltage wiring, Overheated thermal cutout
How to Fix / Troubleshooting
Critical Safety Warning: High-voltage repairs are hazardous and should only be performed by trained professionals.
User-level steps:
- Power cycle: Unplug for 10 minutes and retry. If H97 reappears, internal components are likely at fault.
- Check ventilation: Ensure the microwave has proper clearance and that filters and vents are clean.
Technician actions:
- Test the Frigidaire magnetron, inverter module, and thermal cutouts.
- Inspect high-voltage wiring for arcing or loose connections.
- Replace the failed inverter or magnetron as required.
Recommendation: Schedule service; do not attempt to access the high-voltage section yourself.
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Repair Difficulty
Professional Required
5/5
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