H98
Panasonic
Magnetron / Inverter Protection Error
Microwave does not heat and displays H98 shortly after starting, fan and turntable may run but no heating occurs.
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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 magnetron, Defective inverter board, Open or shorted high-voltage wiring harness between inverter and magnetron
How to Fix / Troubleshooting
Safety Warning: The magnetron and inverter operate at extremely high voltage and can cause severe injury or death. Do not open the cabinet or attempt internal repairs unless you are qualified.
User-level checks:
- Power cycle: Unplug the microwave for 10 minutes to reset the control and inverter protection circuit. Plug back in and test with a cup of water.
- Check for overloading: Remove any large metal racks or accessories and test with only a cup of water. Overloading or improper cookware can sometimes trigger protection.
- Verify door closure: Make sure the door closes firmly and is not sagging; a poor door switch signal can sometimes cause inverter shutdown.
If H98 persists:
- The magnetron or inverter board is likely defective. These components require specialized testing and replacement.
- Contact an authorized Panasonic service center and provide the model number and H98 code. Continuing to use the unit may cause further damage.
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Repair Difficulty
Professional Required
5/5
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