H97
Monogram
Inverter / Magnetron Start-Up Failure
Microwave displays H97 and will not heat; unit 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
Weak or failing magnetron, intermittent inverter board, poor connection at high-voltage connectors, overheated thermal cutout
How to Fix / Troubleshooting
Critical safety warning: This fault involves the high-voltage system. Only qualified technicians should service these components.
- Power reset: Disconnect power for 10 minutes, then restore and test. If H97 returns, internal components are likely failing.
- Check ventilation: Ensure all vents are clear and the unit is installed per Monogram spacing requirements.
- Technician diagnostics: A technician will check the magnetron, inverter board, and thermal cutouts for proper operation and continuity, and inspect for arcing or burnt connectors.
- Replace failed parts: Replace the defective magnetron, inverter board, or thermal cutout as indicated by testing.
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Repair Difficulty
Professional Required
5/5
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