H97
Viking
Inverter Start-Up Failure
Microwave shows 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, Poor connection between control board and inverter, Shorted magnetron drawing excessive current, Overheated inverter
How to Fix / Troubleshooting
Safety: Treat all high-voltage components as dangerous. Disconnect power before any inspection.
- Power reset: Disconnect power for 10 minutes, then test again with a small load of water. If H97 reappears, internal components need attention.
- Check airflow: Confirm that cooling vents are not blocked and that the internal cooling fan operates when cooking is started.
- Inspect wiring: With the cabinet removed and power off, inspect the harness between the main control board and inverter for loose plugs or damaged wires. Reseat all connectors.
- Professional service: If H97 persists, the inverter or magnetron is likely faulty. These parts should be tested and replaced by a qualified technician due to high-voltage risks.
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Repair Difficulty
Professional Required
5/5
Required Part
Inverter Board
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